Fig. 1From: An evidence-based guide to the efficacy and safety of isometric resistance training in hypertension and clinical implicationsVisual depiction of (A) isometric and (B) isotonic muscular contractions (arrows indicate arm movement; no movement (A) and flexion (B)). During an isometric contraction, muscle length does not change; however, tension might increase. During an isotonic contraction, muscle length either shortens (concentric contraction) or lengthens (eccentric contraction) and tension remains the sameBack to article page