Question

which friend is experiencing an internal barrier to physical fitness?
mark lacks access to fitness equipment.
tyler has trouble finding a safe area to work out.
talia puts in only 50 percent of effort during her workout.
clark’s parents fail to support his desire to work out.

Explanation:

Internal barriers to physical fitness are personal, psychological, or self - related factors. Mark's lack of equipment access (external - resource - related), Tyler's trouble finding a safe area (external - environment - related), and Clark's parents' lack of support (external - social - related) are external barriers. Talia's low effort is a personal (internal) issue as it relates to her own motivation/effort level.

Answer:

C. Talia puts in only 50 percent of effort during her workout.