Table 1.

Definitions of functional training.

References	Definition of functional training
Lajoso-Silva et al. (2021)	FT utilizes multi-articular movements to improve balance, increase muscular power and strength, and enhance conditional and coordinative capacities.
Gali et al. (2021)	FT combines neuromuscular control, joint mobility and stability, central stability, trunk alignment and lower limb joint. Unlike traditional muscle strengthening programs, several joints and muscles are exercised in the three planes of movement during FT, simultaneously challenging the brain and the body.
McLaughlin et al. (2020)	Functional training uses functional activities as the training stimulus and is based on the theoretical concept of task specificity.
Farrokhian et al. (2020)	FT is a set of sports activities that are based on daily routine activities such as walking, climbing up stairs and going down, getting up and sitting down and move light things. FT was focused improving physical fitness such as endurance, strength, flexibility, and balance.
Da Silva-Grigoletto et al. (2020)	FT involves resistance training and associated techniques to develop strength, as well as balance, motor coordination, power, and muscle endurance, increasing the ability of individuals to execute ADL, whether they be simpler tasks of daily living or more complex athletic maneuvers.
Cheng et al. (2020)	A form of training that uses modular movements that involve the recruitment of multiple muscle groups, FT is the only program that combines weightlifting, gymnastics, and metabolic conditioning in one continuous session.
Peterson (2017)	FT is designed to enhance the ability of exercisers to meet the demands of performing a wide range of ADL at home, work, or play without undue risk of injury or fatigue.
Aragao-Santos et al. (2020)	FT is a multicomponent training method, which stimulates different physical capacities in the same session. This training method can be carried out with an emphasis on traditional exercises such as squats to improve the strength of lower limbs (element-based functional training) or using exercises more like daily activities such as carrying actions or sit and get up from the floor (task-specific-based functional training).
La Scala Teixeira et al. (2017)	The development of different physical capacities in an integrated and balanced manner to provide autonomy, efficiency and safety during activities related to ADLs, work and/or sports. For this purpose, FT uses strength exercises generally characterized by integrated, multi-joint/multi-segment, asymmetrical, multi-planes, acyclic, intermittent, speedy, and unstable movements that emphasize core stability.
Fleck and Kraemer (2014)	The training that is meant to increase performance in some type of functional task, such as activities of daily living or tests related to athletic performance. FT could refer to virtually any type of training meant to increase motor performance.
Boyle (2016)	Functional training on the other hand uses many concepts developed by sport coaches to train speed, strength, and power to improve sport performance and reduce incidence of injury.
Boyle (2004)	Functional training can therefore be described as purposeful training. In fact, functional training is more accurately represented as “sports-general” training. Functional training is a system that encourages the training of balance and the balancing of training. It is characterized by actions such as squatting and lunging or pushing and pulling. Functional training is best described as a continuum of exercises that teach athletes to handle their own body weight in all planes of movement.

ADLs, activities of daily living; FT, functional training; HIIT, high-intensity interval training.