Forest plot comparing the changes in muscle strength between the exercise and control groups.

<p>Forest plot comparing the changes in muscle strength between the exercise and control groups.</p

Risk of bias graph.

<p>Risk of bias graph.</p

Risk of bias summary.

<p>Risk of bias summary.</p

Forest plot of subgroup analyses comparing changes in muscle strength among adults and children.

<p>Forest plot of subgroup analyses comparing changes in muscle strength among adults and children.</p

Forest plot comparing the changes in cardiorespiratory fitness between the exercise and control groups.

<p>Forest plot comparing the changes in cardiorespiratory fitness between the exercise and control groups.</p

Basic Characteristics of the Included Studies.

<p>Basic Characteristics of the Included Studies.</p

Forest plot comparing the changes in fatigue, anxiety and depression between exercise and control groups.

<p>Forest plot comparing the changes in fatigue, anxiety and depression between exercise and control groups.</p