All Outputs (48)

Mitochondrial hydrogen sulfide supplementation improves health in the C. elegans Duchenne muscular dystrophy model (2021)
Journal Article
Ellwood, R. A., Hewitt, J. E., Torregrossa, R., Philp, A. M., Hardee, J. P., Hughes, S., …Szewczyk, N. J. (2021). Mitochondrial hydrogen sulfide supplementation improves health in the C. elegans Duchenne muscular dystrophy model. Proceedings of the National Academy of Sciences, 118(9), Article e2018342118. https://doi.org/10.1073/pnas.2018342118

Duchenne muscular dystrophy (DMD) is an X-linked recessive disorder characterized by progressive muscle degeneration and weakness due to mutations in the dystrophin gene. The symptoms of DMD share similarities with those of accelerated aging. Recentl... Read More about Mitochondrial hydrogen sulfide supplementation improves health in the C. elegans Duchenne muscular dystrophy model.

Molecular and neural adaptations to neuromuscular electrical stimulation; Implications for ageing muscle (2020)
Journal Article
Guo, Y., Phillips, B. E., Atherton, P. J., & Piasecki, M. (2021). Molecular and neural adaptations to neuromuscular electrical stimulation; Implications for ageing muscle. Mechanisms of Ageing and Development, 193, Article 111402. https://doi.org/10.1016/j.mad.2020.111402

One of the most notable effects of ageing is an accelerated decline of skeletal muscle mass and function, resulting in various undesirable outcomes such as falls, frailty, and all-cause mortality. The loss of muscle mass directly leads to functional... Read More about Molecular and neural adaptations to neuromuscular electrical stimulation; Implications for ageing muscle.

Influence of sex on the age?related adaptations of neuromuscular function and motor unit properties in elite masters athletes (2020)
Journal Article
Piasecki, J., Inns, T. B., Bass, J. J., Scott, R., Stashuk, D. W., Phillips, B. E., …Piasecki, M. (2021). Influence of sex on the age‐related adaptations of neuromuscular function and motor unit properties in elite masters athletes. Journal of Physiology, 599(1), 193-205. https://doi.org/10.1113/jp280679

Motor unit (MU) remodelling acts to minimise loss of muscle fibres following denervation in older age, which may be more successful in masters athletes. Evidence suggests performance and neuromuscular function decline with age in this population, alt... Read More about Influence of sex on the age?related adaptations of neuromuscular function and motor unit properties in elite masters athletes.

Near Fibre Electromyography (2020)
Working Paper
Piasecki, M., C Estruch, O. G., & Stashuk, D. W. Near Fibre Electromyography

Near fibre electromyography (NFEMG) is the use of specifically high-pass filtered motor unit potential (MUPs) (i.e. near fibre MUPs (NFMs)) extracted from needle-detected EMG signals for the examination of changes in motor unit (MU) morphology and el... Read More about Near Fibre Electromyography.

Absence of an ageing?related increase in fibre type grouping in athletes and non?athletes (2020)
Journal Article
Messa, G. A., Piasecki, M., Rittweger, J., McPhee, J. S., Koltai, E., Radak, Z., …Degens, H. (2020). Absence of an ageing‐related increase in fibre type grouping in athletes and non‐athletes. Scandinavian Journal of Medicine and Science in Sports, 30(11), 2057-2069. https://doi.org/10.1111/sms.13778

The ageing‐related loss of muscle mass is thought to be partly attributable to motor neuron loss and motor unit remodelling that result in fibre type grouping. We examined fibre type grouping in 19‐ to 85‐year‐old athletes and non‐athletes and evalua... Read More about Absence of an ageing?related increase in fibre type grouping in athletes and non?athletes.

Targeted genotype analyses of GWAS-derived lean body mass and handgrip strength-associated single nucleotide polymorphisms in elite masters athletes (2020)
Journal Article
Crossland, H., Piasecki, J., McCormick, D., Phillips, B. E., Wilkinson, D. J., Smith, K., …Atherton, P. J. (2020). Targeted genotype analyses of GWAS-derived lean body mass and handgrip strength-associated single nucleotide polymorphisms in elite masters athletes. AJP - Regulatory, Integrative and Comparative Physiology, 319(2), R184-R194. https://doi.org/10.1152/ajpregu.00110.2020

Recent large genome-wide association studies (GWAS) have independently identified a set of genetic loci associated with lean body mass (LBM) and handgrip strength (HGS). Evaluation of these candidate single nucleotide polymorphisms (SNPs) may be usef... Read More about Targeted genotype analyses of GWAS-derived lean body mass and handgrip strength-associated single nucleotide polymorphisms in elite masters athletes.

Relationship of anabolic hormones with motor unit characteristics in quadriceps muscle in healthy and frail ageing men (2020)
Journal Article
Swiecicka, A., Piasecki, M., Stashuk, D., Jones, D., Wu, F., McPhee, J., & Rutter, M. K. (2020). Relationship of anabolic hormones with motor unit characteristics in quadriceps muscle in healthy and frail ageing men. Journal of Clinical Endocrinology and Metabolism, 105(7), https://doi.org/10.1210/clinem/dgaa100

Context Anabolic hormones are important factors in maintaining muscle mass for ageing men, but their role in overall motor unit structure and function is unclear. Objective To determine associations of anabolic and reproductive hormone levels wi... Read More about Relationship of anabolic hormones with motor unit characteristics in quadriceps muscle in healthy and frail ageing men.

The impact of a high-fat diet in mice is dependent on duration and age, and differs between muscles (2020)
Journal Article
Messa, G. A. M., Piasecki, M., Hurst, J., Hill, C., Tallis, J., & Degens, H. (2020). The impact of a high-fat diet in mice is dependent on duration and age, and differs between muscles. Journal of Experimental Biology, 223(6), https://doi.org/10.1242/jeb.217117

© 2020. Published by The Company of Biologists Ltd. Prolonged high-fat diets (HFDs) can cause intramyocellular lipid (IMCL) accumulation that may negatively affect muscle function. We investigated the duration of a HFD required to instigate these cha... Read More about The impact of a high-fat diet in mice is dependent on duration and age, and differs between muscles.

Comparison of Muscle Function, Bone Mineral Density and Body Composition of Early Starting and Later Starting Older Masters Athletes (2019)
Journal Article
Piasecki, J., Ireland, A., Piasecki, M., Deere, K., Hannam, K., Tobias, J., & McPhee, J. S. (2019). Comparison of Muscle Function, Bone Mineral Density and Body Composition of Early Starting and Later Starting Older Masters Athletes. Frontiers in Physiology, 10, https://doi.org/10.3389/fphys.2019.01050

© 2019 Piasecki, Ireland, Piasecki, Deere, Hannam, Tobias and McPhee. Masters endurance runners can epitomize healthy aging; being reflective of the physiological processes of aging without the compounded effects of inactivity. The primary aim of the... Read More about Comparison of Muscle Function, Bone Mineral Density and Body Composition of Early Starting and Later Starting Older Masters Athletes.

Morphological alterations of mouse skeletal muscles during early ageing are muscle specific (2019)
Journal Article
Messa, G., Piasecki, M., Hill, C., McPhee, J., Tallis, J., & Degens, H. (2019). Morphological alterations of mouse skeletal muscles during early ageing are muscle specific. Experimental Gerontology, 125, https://doi.org/10.1016/j.exger.2019.110684

© 2019 Elsevier Inc. One of the hallmarks of ageing is muscle wasting that may be preceded by morphological changes, such as capillary rarefaction. Muscle-specific changes in morphology in early ageing may differ between locomotor and respiratory mus... Read More about Morphological alterations of mouse skeletal muscles during early ageing are muscle specific.

Frailty phenotype and frailty index are associated with distinct neuromuscular electrophysiological characteristics in men (2019)
Journal Article
Swiecicka, A., Piasecki, M., Stashuk, D. W., Ireland, A., Jones, D. A., Rutter, M. K., & McPhee, J. S. (2019). Frailty phenotype and frailty index are associated with distinct neuromuscular electrophysiological characteristics in men. Experimental Physiology, 104(8), 1154-1161. https://doi.org/10.1113/ep087579

Long-Term Endurance and Power Training May Facilitate Motor Unit Size Expansion to Compensate for Declining Motor Unit Numbers in Older Age (2019)
Journal Article
Piasecki, M., Ireland, A., Piasecki, J., Degens, H., Stashuk, D. W., Swiecicka, A., …McPhee, J. S. (2019). Long-Term Endurance and Power Training May Facilitate Motor Unit Size Expansion to Compensate for Declining Motor Unit Numbers in Older Age. Frontiers in Physiology, 10, Article 449. https://doi.org/10.3389/fphys.2019.00449

© 2019 Frontiers Media S.A. All Rights Reserved. The evidence concerning the effects of exercise in older age on motor unit (MU) numbers, muscle fiber denervation and reinnervation cycles is inconclusive and it remains unknown whether any effects are... Read More about Long-Term Endurance and Power Training May Facilitate Motor Unit Size Expansion to Compensate for Declining Motor Unit Numbers in Older Age.

Soluble factors released from activated T-lymphocytes regulate C2C12 myoblast proliferation and cellular signalling, but effects are blunted in the elderly (2018)
Journal Article
Al-Dabbagh, S., McPhee, J. S., Piasecki, M., Stewart, C. E., & Al-Shanti, N. (2019). Soluble factors released from activated T-lymphocytes regulate C2C12 myoblast proliferation and cellular signalling, but effects are blunted in the elderly. Journals of Gerontology, Series A, 74(9), 1375–1385. https://doi.org/10.1093/gerona/gly238

The key objective of this work was to investigate the impact of young and old human lymphocyte secretomes on C2C12 myoblasts regeneration. Conditioned media (CMs) were harvested from isolated young and older lymphocytes treated with (activated AC), o... Read More about Soluble factors released from activated T-lymphocytes regulate C2C12 myoblast proliferation and cellular signalling, but effects are blunted in the elderly.

The age-related loss of skeletal muscle mass and function: measurement and physiology of muscle fibre atrophy and muscle fibre loss in humans (2018)
Journal Article
Wilkinson, D. J., Piasecki, M., & Atherton, P. J. (2018). The age-related loss of skeletal muscle mass and function: measurement and physiology of muscle fibre atrophy and muscle fibre loss in humans. Ageing Research Reviews, 47, 123-132. https://doi.org/10.1016/j.arr.2018.07.005

Age-related loss of skeletal muscle mass and function, sarcopenia, is associated with physical frailty and increased risk of morbidity (chronic diseases), in addition to all-cause mortality. The loss of muscle mass occurs incipiently from middle-age... Read More about The age-related loss of skeletal muscle mass and function: measurement and physiology of muscle fibre atrophy and muscle fibre loss in humans.

Hip and spine bone mineral density are greater in master sprinters, but not endurance runners compared with non-athletic controls (2018)
Journal Article
Piasecki, J., McPhee, J., Hannam, K., Deere, K., Elhakeem, A., Piasecki, M., …Ireland, A. (2018). Hip and spine bone mineral density are greater in master sprinters, but not endurance runners compared with non-athletic controls. Archives of Osteoporosis, 13, https://doi.org/10.1007/s11657-018-0486-9

Summary: We examined bone density in older athletes and controls. Sprinters had greater hip and spine bone density than endurance athletes and controls, whereas values were similar in the latter two groups. These results could not be explained by dif... Read More about Hip and spine bone mineral density are greater in master sprinters, but not endurance runners compared with non-athletic controls.

Handgrip Strength Cannot Be Assumed a Proxy for Overall Muscle Strength (2018)
Journal Article
Yeung, S. S., Reijnierse, E. M., Trappenburg, M. C., Hogrel, J., McPhee, J. S., Piasecki, M., …Maier, A. B. (2018). Handgrip Strength Cannot Be Assumed a Proxy for Overall Muscle Strength. Journal of the American Medical Directors Association, 19(8), 703-709. https://doi.org/10.1016/j.jamda.2018.04.019

Objectives: Dynapenia, low muscle strength, is predictive for negative health outcomes and is usually expressed as handgrip strength (HGS). Whether HGS can be a proxy for overall muscle strength and whether this depends on age and health status is co... Read More about Handgrip Strength Cannot Be Assumed a Proxy for Overall Muscle Strength.

Failure to expand the motor unit size to compensate for declining motor unit numbers distinguishes sarcopenic from non-sarcopenic older men (2018)
Journal Article
Piasecki, M., Ireland, A., Piasecki, J., Stashuk, D., Swiecicka, A., Rutter, M., …McPhee, J. (2018). Failure to expand the motor unit size to compensate for declining motor unit numbers distinguishes sarcopenic from non-sarcopenic older men. Journal of Physiology, 596(9), https://doi.org/10.1113/JP275520

Sarcopenia results from the progressive loss of skeletal muscle mass and reduced function in older age. It is likely to be associated with the well‐documented reduction of motor unit numbers innervating limb muscles and the increase in size of surviv... Read More about Failure to expand the motor unit size to compensate for declining motor unit numbers distinguishes sarcopenic from non-sarcopenic older men.

The contributions of fiber atrophy, fiber loss, in situ specific force, and voluntary activation to weakness in sarcopenia (2018)
Journal Article
McPhee, J. S., Cameron, J., Maden-Wilkinson, T., Piasecki, M., Yap, M. H., Jones, D. A., & Degens, H. (2018). The contributions of fiber atrophy, fiber loss, in situ specific force, and voluntary activation to weakness in sarcopenia. Journals of Gerontology, Series A, 73(10), 1287-1294. https://doi.org/10.1093/gerona/gly040

The contributions of fiber atrophy, fiber loss, in situ specific force, and voluntary activation to weakness in sarcopenia remain unclear. To investigate, 40 older (20 women; age 72 ± 4 years) and 31 younger adults (15 women, age 22 ± 3 years) comple... Read More about The contributions of fiber atrophy, fiber loss, in situ specific force, and voluntary activation to weakness in sarcopenia.

The strength of weight-bearing bones is similar in amenorrheic and eumenorrheic elite long-distance runners (2018)
Journal Article
Piasecki, J., Ireland, A., Piasecki, M., Cameron, J., McPhee, J. S., & Degens, H. (2018). The strength of weight-bearing bones is similar in amenorrheic and eumenorrheic elite long-distance runners. Scandinavian Journal of Medicine and Science in Sports, 28(5), 1559-1568. doi:10.1111/sms.13062

Regular intense endurance exercise can lead to amenorrhea with possible adverse consequences for bone health. We compared whole body and regional bone strength and skeletal muscle characteristics between amenorrheic (AA: n = 14) and eumenorrheic (EA:... Read More about The strength of weight-bearing bones is similar in amenorrheic and eumenorrheic elite long-distance runners.

The reliability of methods to estimate the number and size of human motor units and their use with large limb muscles (2018)
Journal Article
Piasecki, M., Ireland, A., Piasecki, J., Stashuk, D., McPhee, J., & Jones, D. (2018). The reliability of methods to estimate the number and size of human motor units and their use with large limb muscles. European Journal of Applied Physiology, 118(4), 767-775. https://doi.org/10.1007/s00421-018-3811-5

Purpose Current methods for estimating muscle motor unit (MU) number provide values which are remarkably similar for muscles of widely differing size, probably because surface electrodes sample from similar and relatively small volumes in each mus... Read More about The reliability of methods to estimate the number and size of human motor units and their use with large limb muscles.