Here are some exercises that can help to build upper body strength:
Push-ups: Push-ups are a great way to work the chest, triceps, and shoulders. They can be modified to make them easier or harder depending on your fitness level.
Pull-ups: Pull-ups work the back, biceps, and forearms. If you can't do a full pull-up yet, you can use an assisted pull-up machine or do negative pull-ups (jump to the top position and lower yourself slowly)
Dumbbell or barbell bench press: This exercise targets the chest and triceps.
Dumbbell or barbell rows: This exercise targets the back and biceps.
Shoulder press: This exercise targets the shoulders. You can do it with dumbbells or a barbell.
Bicep curls: This exercise targets the biceps. You can do it with dumbbells, barbells or resistance bands.
Tricep extensions: This exercise targets the triceps. You can do it with dumbbells, barbells or resistance bands.
Lateral raises: This exercise targets the shoulders. You can do it with dumbbells or resistance bands.
Pullovers: This exercise targets the lats, chest, and triceps. You can do it with dumbbells or a barbell.
Remember to vary your exercises, use proper form, and increase the weight or reps as you progress. It's also important to maintain good posture and balance during your workout and to avoid overtraining, as it can lead to injury. Consult with a fitness professional to help you build a proper workout plan that suits your fitness level and goals.