IL15 and neoplasm: In a study of tumour‐bearing mice that were randomly divided into control and HIIT (5 × 10 repetitions, 2 min, 70% Vmax +5 × 9 repetitions, 2 min, 50% Vmax, n = 8) groups, IL‐15 protein expression was increased in the gastrocnemius muscle of HIIT mice after 6 weeks of exercise.78