The Study
Low‐volume resistance exercise attenuates the decline in strength and muscle mass associated with immobilization
This study showed that when people with healthy muscles did leg exercises with a special electric zap device, their hearts beat faster and they breathed harder—meaning they worked harder. But it didn’t test if this actually helped people who are sick or stuck in bed get stronger or keep their muscles.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
When people are stuck in bed, their muscles shrink. This study tested if doing a few leg bends with electric stimulation helps keep muscles strong and makes the exercise harder without feeling more tiring.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 572 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes—this means even very weak or bedridden patients could get meaningful exercise without standing or lifting heavy weights.
- 2140 leg contractions over 14 days kept thigh muscles from shrinking.
- 3Adding electric stimulation to knee bends made oxygen use go up by 14.4% and heart rate rise by 6.8%, reaching the effort level of light housework.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Muscle & Nerve
Year
2010
Authors
B. R. Oates, E. Glover, Daniel W D West, J. Fry, M. Tarnopolsky, Stuart M Phillips
Related Content
Claims (6)
When humans are immobilized for 14 days, their muscle volume decreases by 2-3%.
When healthy young adults perform knee bending exercises while lying down and receive electrical stimulation to their muscles, their oxygen consumption rises by 14.4% and their heart rate increases by 6.8% compared to doing the same exercise without electrical stimulation.
Performing 140 resistance contractions over 14 days during leg immobilization maintains quadriceps muscle size and strength in healthy young adults, but does not fully stop muscle loss in the calf muscles.
When electrical stimulation is applied to muscles at the same time as bending the knee while lying on the back, the body uses more energy but does not change the ratio of oxygen used to carbon dioxide produced.
Supine knee bending performed with a hybrid training system results in a metabolic intensity of 2.4 METs, which is similar to the energy expenditure of light housework.
When electrical stimulation is applied to muscles during knee bending, the body uses more energy without making the person feel like they are working harder or breathing more intensely.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.