scholarly journals Muscle Transcriptional Networks Linked To Resistance Exercise Training To Predict Hypertrophic Response Heterogeneity

2021 ◽  
Vol 53 (8S) ◽  
pp. 466-466
Author(s):  
Margaret Bell ◽  
Kaleen Lavin ◽  
Jeremy McAdam ◽  
Bailey Peck ◽  
R. Grace Walton ◽  
...  
Keyword(s):  
Exercise Training ◽  
Resistance Exercise ◽  
Transcriptional Networks ◽  
Resistance Exercise Training ◽  
Hypertrophic Response

Muscle Transcriptional Networks Linked to Resistance Exercise Training Hypertrophic Response Heterogeneity

2021 ◽  
Author(s):  
Kaleen M. Lavin ◽  
Margaret B. Bell ◽  
Jeremy S. McAdam ◽  
Bailey D Peck ◽  
R. Grace Walton ◽  
...  
Keyword(s):  
Gene Expression ◽  
Exercise Training ◽  
Resistance Exercise ◽  
Muscle Hypertrophy ◽  
Thigh Muscle ◽  
Secondary Outcome ◽  
Transcriptional Networks ◽  
Type I ◽  
Resistance Exercise Training ◽  
Hypertrophic Response

The skeletal muscle hypertrophic response to resistance exercise training (RT) is highly variable across individuals. The molecular underpinnings of this heterogeneity are unclear. This study investigated transcriptional networks linked to RT-induced muscle hypertrophy, classified as (i) predictive of hypertrophy, (ii) responsive to RT independent of muscle hypertrophy, or (iii) plastic with hypertrophy. Older adults (n=31, 18F/13M, 70±4y) underwent 14-wk RT (3d/wk, alternating high-low-high intensity). Muscle hypertrophy was assessed by pre- to post-RT change in mid-thigh muscle cross-sectional area (CSA) [computed tomography (CT), primary outcome], and thigh lean mass [dual-energy x-ray absorptiometry (DXA), secondary outcome]. Transcriptome-wide poly-A RNA-seq was performed on vastus lateralis tissue collected pre- (n=31) and post-RT (n=22). Prediction networks (using only baseline RNAseq) were identified by Weighted Gene Correlation Network Analysis (WGCNA). To identify Plasticity networks, WGCNA change indices for paired samples were calculated and correlated to changes in muscle size outcomes. Pathway-Level Information ExtractoR (PLIER) was applied to identify Response networks and link genes to biological annotation. Predictionnetworks (n=6) confirmed transcripts previously connected to resistance/ aerobic training adaptations in the MetaMEx database while revealing novel member genes that should fuel future research to understand the influence of baseline muscle gene expression on hypertrophy. Response networks (n=6) indicated RT-induced increase in aerobic metabolism and reduced expression of genes associated with spliceosome biology and type-I myofibers. A single exploratory Plasticity network was identified. Findings support that inter-individual differences in baseline gene expression may contribute more than RT-induced changes in gene networks to muscle hypertrophic response heterogeneity.

scholarly journals Type 2 Diabetes Reduces the Muscle Anabolic Effect of Resistance Exercise Training in Older Adults

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 529-529
Author(s):  
Amanda Randolph ◽  
Tatiana Moro ◽  
Adetutu Odejimi ◽  
Blake Rasmussen ◽  
Elena Volpi
Keyword(s):  
Type 2 Diabetes ◽  
Older Adults ◽  
Muscle Strength ◽  
Exercise Training ◽  
Resistance Exercise ◽  
Lean Mass ◽  
Synthesis Rate ◽  
Resistance Exercise Training ◽  
Appendicular Lean Mass

Abstract Type 2 Diabetes Mellitus (T2DM) accelerates the incidence and increases the prevalence of sarcopenia in older adults. This suggests an urgent need for identifying effective sarcopenia treatments for older adults with T2DM. It is unknown whether traditional approaches, such as progressive resistance exercise training (PRET), can effectively counteract sarcopenia in older patients with T2DM. To test the efficacy of PRET for the treatment of sarcopenia in older adults with T2DM, 30 subjects (15 T2DM and 15 age- and sex- matched controls) underwent metabolic testing with muscle biopsies before and after a 13-week full-body PRET program. Primary outcome measures included changes in appendicular lean mass, muscle strength, and mixed muscle fractional synthesis rate (FSR). Before PRET, BMI-adjusted appendicular lean mass was significantly lower in the T2DM group (0.7095±0.0381 versus 0.8151±0.0439, p<0.0001). As a result of PRET, appendicular lean mass adjusted for BMI and muscle strength increased significantly in both groups, but to a lesser extent for the T2DM group (p=0.0009) . Preliminary results for FSR (n=25) indicate that subjects with T2DM had lower basal FSR prior to PRET (p=0.0197) . Basal FSR increased significantly in the control group after PRET (p=0.0196), while it did not change in the T2DM group (p=0.3537). These results suggest that in older adults the positive effect of PRET on muscle anabolism and strength is reduced by T2DM . Thus, older adults with T2DM may require more intensive, multimodal and targeted sarcopenia treatment. Funded by NIH R01AG049611 and P30AG024832.

Blunting of adaptive responses to resistance exercise training in women over 75y

2011 ◽  
Vol 46 (11) ◽  
pp. 884-890 ◽  
Author(s):  
C.A. Greig ◽  
C. Gray ◽  
D. Rankin ◽  
A. Young ◽  
V. Mann ◽  
...  
Keyword(s):  
Exercise Training ◽  
Resistance Exercise ◽  
Adaptive Responses ◽  
Resistance Exercise Training

Effects of 12 weeks of aerobic versus combined aerobic plus resistance exercise training on short-term blood pressure variability in patients with hypertension

2021 ◽  
Vol 130 (4) ◽  
pp. 1085-1092
Author(s):  
Giuseppe Caminiti ◽  
Ferdinando Iellamo ◽  
Annalisa Mancuso ◽  
Anna Cerrito ◽  
Matteo Montano ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Exercise Training ◽  
Resistance Exercise ◽  
Aerobic Exercise ◽  
Blood Pressure Variability ◽  
Short Term ◽  
Resistance Exercise Training ◽  
Hypertensive Patients ◽  
Combined Exercise ◽  
Resistance Exercises

Combined exercise training (CT) including aerobic plus resistance exercises could be more effective in comparison with aerobic exercise (AT) alone in reducing blood pressure variability (BPV) in hypertensive patients. We report that CT was indeed more effective than AT in reducing short-term BPV, and both exercise modalities reduced BP levels to the same extent. CT appears to be a more appropriate exercise modality if the objective is to reduce BPV in addition to BP levels.

Sign in / Sign up

Export Citation Format

Share Document