These 5 Exercises will Tighten Your Underarm Flab

Pushups:- 2 to 3 sets of 15 to 20 reps.

Chest Press using weights: - 90-degree angle.

Tricep Dips: - 2 to 3 sets of 12 to 20 reps.

Tricep extension using weights: - 2 to 2 sets of 12 rep.

Bent-over row: - 2 to 3sets of 12 reps.

Basic Exercises 

chest left and right

Running