Article in English: Lie on your back on a workout bench or other flat surface. Bring the dumbbells up to your chest, holding them shoulder-width apart with your palms facing each other. Rotate your arms so your palms face out and your forearm and upper-arm create a 90-degree angle. Exhale as you use your chest muscles to push the dumbbells up. Lock your arms at the top of the push and breathe for a second. Lower the weights slowly as you inhale.  Perform 3 sets of 8 to 10 reps of this exercise. To determine how much weight you should use, figure out the heaviest weight you can use for 1 rep. Then figure out about 60 to 70 percent of that weight for your regular set. For example, if the heaviest weight you can use for 1 rep is 10 lb (4.5 kg), then you should use 6 lb (2.7 kg) dumbbells for your sets. If it begins to feel like there's hardly any resistance with the weight you're using, try the heaviest weight test again and readjust the weights you use. Stand with your legs just less than shoulder-width apart. Hold the dumbbells at your sides. Bring one dumbbell up so it’s even with your shoulder and your palm faces out – this is your starting position. Exhale and push the dumbbell up so your arm is fully extended. Pause for a second and then lower the dumbbell back down. Perform 8 to 10 reps and then switch arms. Repeat 3 sets. Stand with your legs about shoulder-width apart. Hold a dumbbell in each hand with your palms facing your thighs. Keep your back straight and your arms slightly bent at the elbow. Lift the dumbbells to your shoulders as you exhale, keeping them as close to your sides as possible. Keep your elbows above your forearms as you lift, and bring the dumbbells as close to your chin as possible. Hold the dumbbells for a second, and then inhale as you slowly lower them back down. Repeat 3 sets of 10 to 12 reps. Stand in front of a bench or elevated platform. Place your hands on the bench or platform, with your hands slightly more than shoulder-width apart. Move your feet back so that your body is straight back and...

Summary in Vietnamese:
Nằm ghế đẩy ngực với tạ đôi để tập cho cơ ngực. Tập đẩy vai bằng một tay để phát triển cơ tam đầu. Chèo tạ đơn thẳng đứng để làm săn chắc lưng. Tập chống đẩy dốc lên. Duỗi bắp tay sau. Chọn 2-3 bài tập này cho mỗi buổi tập.