Before beginning the workout, warm up with dynamic stretching and mobility exercises for the shoulders, hips, and ankles. For double dumbbell ground-to-overhead, use a weight that allows for good form and full range of motion. If 2x50lbs or 2x35lbs is too heavy, reduce the weight to maintain proper technique and safety. Wearing a weight vest or ruck will increase the intensity of the workout, so be mindful of your form and pace throughout the 100 reps. After completing the workout, cool down with stretching and mobility exercises, particularly focusing on the shoulders, hips, and lower back.