Table 1.

Terminology.

Terms	Definition	Organization/reference
CrossFit®	CrossFit® is a strength and conditioning system built on constantly varied, if not randomized, functional movements executed at high intensity.	CrossFit® Inc. Glassman, 2007
High-intensity multimodal training (HIMT)	HIMT involves exercise programs that mix many different exercise modalities (e.g., weightlifting, powerlifting, gymnastic, calisthenics, plyometric, running, and others) and train multiple physical capacities at the same time (e.g., cardiorespiratory, muscle strength, and flexibility) HIMT encompasses all relevant styles of combined aerobic, resistance and/ or bodyweight training (i.e., HIFT, bodyweight HIIT, CrossFit®) performed at a high or vigorous intensity	Carnes and Mahoney, 2019 Sharp et al., 2022
Extreme conditioning programs (ECP)	High-volume aggressive training workouts that use a variety of high-intensity exercises and often time a maximal number of repetitions with short rest periods between sets.	Bergeron et al., 2011
Functional fitness	A sport that aims to develop athletes' proficiency across a variety of movement patterns, activities, and energy systems. Training must develop the competency in various realms, including demonstrations of their aerobic capacity, strength, bodyweight endurance, bodyweight skill, mixed modal capacity, and power.	The International Functional Fitness Federation, iF3
High-intensity functional training (HIFT)	A training style [or program] that incorporates a variety of functional movements, performed at high intensity [relative to an individual's ability], and designed to improve parameters of general physical fitness (e.g., cardiovascular endurance, strength, body composition, flexibility, etc.) and performance (e.g., agility, speed, power, strength, etc.)	Feito et al., 2018
Mixed modal training	An approach that combines several physical training modalities in a single program	Marchini et al., 2019