Possibly owing to differences in mesocycle length, conditioning programs, and program variables, competitive athletes either maintained or improved strength (and/or speed-strength) performance by integrating and during offseason, pre-season, and in-season conditioning. Please choose two (2).

The answer is "strength-power periodization and daily undulating periodization"

Explanation:

The probability in which competitive athletes have preserved or improved strength (and/or pace capacity) output through the essential strength linear progressions and on-the-go linear progressions from off, post, and also in conditions due to differences in mesocycle length, scheduling, and program factors.

answer; empathy;