Table 1.

Research strategy.

Investigator number	Descriptors
1	(“Hierarchical Model of Intrinsic and Extrinsic Motivation” OR “motivational sequence”) AND (exercise OR gym OR fitness OR “health clubs”) AND (interpersonal behavio* OR “instructor behaviors” OR “social support” OR motiv* OR “behavior regulation” OR “basic psychological needs” OR enjoyment OR frequency OR intention OR persistence)