Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

Many people who go to the gym tend to skip "leg day," finding it tougher than other parts of their workout routine. One primary reason is that leg exercises demand a lot of energy and endurance, which can make them feel overwhelming. Leg muscles, like the thighs and calves, are larger and need more effort to train properly. Arm exercises, (18) ________, feel more manageable by comparison, leading some to favor them over leg workouts.
Another reason gym-goers avoid leg day is the slow progress they experience with leg muscle growth. Unlike the arms or chest, which can show growth after a few weeks, (19) _______. This slower progress can feel frustrating, especially for people hoping to see quick changes in their appearance. Therefore, (20) ________.
Finally, the intense soreness that follows leg day can discourage people from keeping up with it consistently. Leg workouts, which often involve squats and lunges, (21) ________. Exhausted from the workout, (22) ________. While avoiding leg day might make things easier, skipping it regularly can lead to an unbalanced body, so it's essential for a well-rounded fitness plan.