Effect of training volume on footstrike patterns over an exhaustive run

Abstract Background To investigate how anatomical cross-sectional area and volume of quadriceps and triceps surae muscles were affected by ageing, and by resistance training in older and younger men, in vivo. Methods The old participants were randomly assigned to moderate (O55, n = 13) or high-load (O80, n = 14) resistance training intervention (12 weeks; 3 times/week) corresponding to 55% or 80% of one repetition maximum, respectively. Young men (Y55, n = 11) were assigned to the moderate-intensity strengthening exercise program. Each group received the exact same training volume on triceps surae and quadriceps group (Reps x Sets x Intensity). The fitting polynomial regression equations for each of anatomical cross-sectional area-muscle length curves were used to calculate muscle volume (contractile content) before and after 12 weeks using magnetic resonance imaging scans. Results Only Rectus femoris and medial gastrocnemius muscle showed a higher relative anatomical cross-sectional area in the young than the elderly on the proximal end. The old group displayed a higher absolute volume of non-contractile material than young men in triceps surae (+ 96%). After training, Y55, O55 and O80 showed an increase in total quadriceps (+ 4.3%; + 6.7%; 4.2% respectively) and triceps surae (+ 2.8%; + 7.5%; 4.3% respectively) volume. O55 demonstrated a greater increase on average gains compared to Y55, while no difference between O55 and O80 was observed. Conclusions Muscle loss with aging is region-specific for some muscles and uniform for others. Equivalent strength training volume at moderate or high intensities increased muscle volume with no differences in muscle volume gains for old men. These data suggest that physical exercise at moderate intensity (55 to 60% of one repetition maximum) can reverse the aging related loss of muscle mass. Trial registration NCT03079180 in ClinicalTrials.gov. Registration date: March 14, 2017.

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Training volume is associated with pain sensitivity, but not with endogenous pain modulation, in competitive swimmers

Physical Therapy in Sport ◽

10.1016/j.ptsp.2019.04.001 ◽

2019 ◽

Vol 37 ◽

pp. 150-156 ◽

Cited By ~ 2

Author(s):

Kevin Kuppens ◽

Stef Feijen ◽

Nathalie Roussel ◽

Jo Nijs ◽

Patrick Cras ◽

...

Keyword(s):

Pain Sensitivity ◽

Pain Modulation ◽

Training Volume ◽

Endogenous Pain Modulation ◽

Competitive Swimmers

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Anodal transcranial direct current stimulation enhances strength training volume but not the force–velocity profile

European Journal of Applied Physiology ◽

10.1007/s00421-020-04417-2 ◽

2020 ◽

Vol 120 (8) ◽

pp. 1881-1891 ◽

Cited By ~ 1

Author(s):

Carlos Alix-Fages ◽

Amador García-Ramos ◽

Giancarlo Calderón-Nadal ◽

David Colomer-Poveda ◽

Salvador Romero-Arenas ◽

...

Keyword(s):

Velocity Profile ◽

Strength Training ◽

Direct Current ◽

Transcranial Direct Current Stimulation ◽

Training Volume ◽

Direct Current Stimulation ◽

Force Velocity

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Effects of Creatine Monohydrate Supplementation During Combined Strength and High Intensity Rowing Training on Performance

Canadian Journal of Applied Physiology ◽

10.1139/h01-029 ◽

2001 ◽

Vol 26 (6) ◽

pp. 527-542 ◽

Cited By ~ 24

Author(s):

Daniel G. Syrotuik ◽

Alex B. Game ◽

Ellen M. Gillies ◽

Gordon J. Bell

Keyword(s):

Body Composition ◽

Resistance Training ◽

High Intensity ◽

Maintenance Dose ◽

Creatine Monohydrate ◽

Training Volume ◽

Placebo Condition ◽

Strength Performance ◽

Composition Formula ◽

Training Interval

This study investigated the effect of creatine monohydrate (Cr) supplementation on performance and training volume in rowers. Twenty-two rowers trained with continuous and interval rowing and resistance training 4 and 2 days/week, respectively, for 6 weeks. Cr supplementation consisted of a 5-day load (0.3 g/kg−1•day−1) followed by a 5-week maintenance dose (0.03 g/kg−1•day−1) while training. Five days of Cr loading did not change body composition, repeated interval rowing performance, 2,000-m rowing times, or strength performance. Five additional weeks of training with a maintenance dose of Cr or placebo significantly improved body composition, [Formula: see text] 2,000-m rowing times, repeated power interval performance, and strength to a similar extent in both groups. Subjects training with Cr did not perform more repetitions per set of strength exercise nor produce or maintain higher power outputs during repeated rowing sessions. Cr supplementation did not increase performance or training volume over a placebo condition in rowers that performed a combined high intensity rowing and strength program. Key Words: ergogenic, anaerobic, resistance training, interval training

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Effect of intensified training on muscle ion kinetics, fatigue development, and repeated short-term performance in endurance-trained cyclists

AJP Regulatory Integrative and Comparative Physiology ◽

10.1152/ajpregu.00467.2012 ◽

2013 ◽

Vol 305 (7) ◽

pp. R811-R821 ◽

Cited By ~ 28

Author(s):

Thomas P. Gunnarsson ◽

Peter M. Christensen ◽

Martin Thomassen ◽

Lars R. Nielsen ◽

Jens Bangsbo

Keyword(s):

Buffer Capacity ◽

Work Capacity ◽

Maximal Heart Rate ◽

Training Volume ◽

Muscle Lactate ◽

High Intensity Training ◽

Fatigue Development ◽

Improved Performance ◽

Term Performance

The effects of intensified training in combination with a reduced training volume on muscle ion kinetics, transporters, and work capacity were examined. Eight well-trained cyclists replaced their regular training with speed-endurance training (12 × 30 s sprints) 2–3 times per week and aerobic high-intensity training (4–5 × 3–4 min at 90–100% of maximal heart rate) 1–2 times per week for 7 wk and reduced training volume by 70% (intervention period; IP). The duration of an intense exhaustive cycling bout (EX2; 368 ± 6 W), performed 2.5 min after a 2-min intense cycle bout (EX1), was longer ( P < 0.05) after than before IP (4:16 ± 0:34 vs. 3:37 ± 0:28 min:s), and mean and peak power during a repeated sprint test improved ( P < 0.05) by 4% and 3%, respectively. Femoral venous K+ concentration in recovery from EX1 and EX2 was lowered ( P < 0.05) after compared with before IP, whereas muscle interstitial K+ concentration and net muscle K+ release during exercise was unaltered. No changes in muscle lactate and H+ release during and after EX1 and EX2 were observed, but the in vivo buffer capacity was higher ( P < 0.05) after IP. Expression of the ATP-sensitive K+ (KATP) channel (Kir6.2) decreased by IP, with no change in the strong inward rectifying K+ channel (Kir2.1), muscle Na+-K+ pump subunits, monocarboxylate transporters 1 and 4 (MCT1 and MCT4), and Na+/H+ exchanger 1 (NHE1). In conclusion, 7 wk of intensified training with a reduced training volume improved performance during repeated intense exercise, which was associated with a greater muscle reuptake of K+ and muscle buffer capacity but not with the amount of muscle ion transporters.

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