During healing, which contraction type should generally be avoided until there are no adverse tissue effects?

During healing, which contraction type should generally be avoided until there are no adverse tissue effects?

• A. Concentric contractions
• B. Isotonic training
• C. High-load resistance
• D. Eccentric contractions

Answer: (D)

Eccentric contractions should be avoided early in healing because they place high tensile forces on repair tissue as the muscle lengthens under load. This increased mechanical demand can exceed the tissue’s limited tolerance during the inflammatory and proliferative phases, leading to pain, swelling, microtrauma, or a delay in healing. Keep loading light and controlled until there are no adverse tissue effects and the tissue’s tolerance has improved; only then can structured eccentric work be introduced to promote remodeling. Concentric contractions and broader isotonic or higher-load approaches are generally safer to initiate earlier, with eccentric work reserved for later stages when the tissue can handle it.

Eccentric contractions should be avoided early in healing because they place high tensile forces on repair tissue as the muscle lengthens under load. This increased mechanical demand can exceed the tissue’s limited tolerance during the inflammatory and proliferative phases, leading to pain, swelling, microtrauma, or a delay in healing. Keep loading light and controlled until there are no adverse tissue effects and the tissue’s tolerance has improved; only then can structured eccentric work be introduced to promote remodeling. Concentric contractions and broader isotonic or higher-load approaches are generally safer to initiate earlier, with eccentric work reserved for later stages when the tissue can handle it.