The term isotonic may refer to:
*
Isotonic (exercise physiology)
In an isotonic contraction, tension remains the same, whilst the muscle's length changes. Isotonic contractions differ from isokinetic contractions in that in isokinetic contractions the muscle speed remains constant. While superficially identica ...
, a type of muscle contraction
*
Isotonic regression
In statistics and numerical analysis, isotonic regression or monotonic regression is the technique of fitting a free-form line to a sequence of observations such that the fitted line is non-decreasing (or non-increasing) everywhere, and lies as ...
, a type of numerical analysis
*Isotonic, one of three types of tonicity that characterize a solution's concentration; see
Tonicity#Isotonicity
*A
sports drink
Sports drinks, also known as electrolyte drinks, are functional beverages whose stated purpose is to help Sportsperson, athletes replace water, electrolytes, and energy before, during and especially after training or competition. There are many ...
that contains similar concentrations of salt and sugar to the human body
{{disambig
ca:Isotònic