The Claim
In older obese adults with heart failure with preserved ejection fraction, adding resistance training to caloric restriction and aerobic exercise significantly improves leg muscle strength by approximately 5.4% and muscle quality by 8.7% over 20 weeks without increasing skeletal muscle mass.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In older adults who are obese and have heart failure with preserved ejection fraction, adding resistance training to diet and aerobic exercise increases leg muscle strength by 5.4% and muscle quality by 8.7% over 20 weeks without increasing muscle size.
See the scientific wording
Adding resistance training to caloric restriction and aerobic exercise in older obese adults with heart failure with preserved ejection fraction significantly improves leg muscle strength by approximately 5.4% and muscle quality by 8.7% over 20 weeks, without increasing skeletal muscle mass, indicating that resistance training enhances the functional capacity of existing muscle tissue despite ongoing muscle loss.
When muscles are forced to work harder during weight training, the nerve signals to those muscles become stronger and more coordinated, and the muscle fibers make more of the proteins that generate force. This allows the muscles to produce more strength and work more efficiently per unit of tissue, even when the total amount of muscle tissue is shrinking.
What the research says
1 studyIn older, overweight people with a type of heart failure, adding weight training to dieting and walking made their legs stronger and their muscles work better—even though they still lost the same amount of muscle as those who didn’t lift weights.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.