1. in a manner involving muscle contraction with movement but constant tension
Usage: exercise physiology
2. in a manner relating to solutions having equal osmotic pressure
Usage: biology; chemistry

Examples

• The athlete trained isotonically using free weights and resistance bands.
• She performed squats isotonically to build leg strength.
• The cells were suspended isotonically to prevent damage.
• The solution was prepared isotonically to match body fluids.
• Isotonically contracting muscles change length during exercise.
• The sports drink was formulated isotonically for optimal absorption.