Break each strength training activity into specific exercise plans. List all of the kinds of exercises you will perform. These could include squats, pull-ups, crunches, or any other kind of exercise that uses body weight, free weights, or machines. For each strength training exercise in your fitness plan, list the exercise, the day, number of reps, and number of sets.

Strength Training Activity: Squats

Exercise Plan:
- Day 1: Barbell Back Squats
- 3 sets of 8 reps
- Day 3: Dumbbell Goblet Squats
- 3 sets of 12 reps
- Day 5: Bodyweight Squats
- 3 sets of 15 reps

Strength Training Activity: Pull-ups

Exercise Plan:
- Day 2: Overhand Grip Pull-ups
- 3 sets of 5 reps
- Day 4: Underhand Grip Chin-ups
- 3 sets of 8 reps
- Day 6: Assisted Pull-ups Machine
- 3 sets of 10 reps

Strength Training Activity: Crunches

Exercise Plan:
- Day 1: Bicycle Crunches
- 3 sets of 20 reps (10 each side)
- Day 3: Russian Twists
- 3 sets of 15 reps (each side)
- Day 5: Plank to Knee Crunches
- 3 sets of 10 reps (each side)