Is a Heated Workout More Effective?
Briefly

"Applying heat directly to your muscles, such as with a heating pad, can increase your flexibility and range of motion. Stretching in a heated room may have similar effects, though there is limited research in this area."
"Your blood vessels expand in the heat, allowing them to deliver more oxygen and blood to your muscles and tendons. This may help loosen your muscles and make you more flexible."
"Both heat and exercise make your cardiovascular system work harder. Those stressors trigger changes that can improve your health, such as strengthening your heart and lowering your blood pressure."
Read at www.nytimes.com
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