Start standing, holding light-to-medium-weight dumbbells at your shoulders, chest up, core braced. Step your right foot back, then bend at both knees, lowering your torso until your left thigh is parallel to the ground. Press back up to standing, then press the dumbbells straight overhead. Lower them back to your shoulders and do a lunge rep with your left leg. Alternate legs on every rep until time’s up. Do 3 sets.
This video is good for starting out. I was sore after doing it but I didn't feel like i was going to keel over or anything. I mean you'll definitely grow out of this video but it's good to get your head back in the muscle building routine. I'd also recommend this for like someone in their 40's+ because it's low impact and will just help you keep your strength up.
How much weight should you use? I can’t answer that, specifically. The first thing you must do is learn how to correctly perform each exercise. Once you’re confident with the movement, use a challenging weight for every exercise, and get stronger every time you repeat the workout (more on this below). What does a “challenging weight” mean? You should have to focus and work fairly hard using an appropriate weight for the provided rep range. Stated another way: If you can easily perform 10 or more reps with a weight or variation when the goal is to perform challenging sets of 5-8 reps, it’s too easy. Use warm-up sets to find the correct weight.
Keep your body fueled. Proper nutrition is also critical to lean muscle development, and fueling before and after a workout helps maximize the benefits of strength-training exercises, research has found. Before your strength workout, a light snack with carbohydrates and protein in a 4:1 ratio has been shown to be most beneficial. Examples include low-fat yogurt and a banana, or low-fat string cheese with whole-grain crackers. Within 45 minutes after a workout, eat some carbs and protein in a 3:1 ratio – such as stir-fried chicken and vegetables over brown rice.
This week you're going to continue with the circuit-style sets; this time you'll perform only 12 reps of each movement, but there are two (tough!) changes: You'll complete a total of 4 full circuits (that's four sets of each exercise for both workouts) and there will be no rest in between each circuit. This week is all about keeping you moving! After you finish the last movement of either workout, you'll immediately return to the first movement and begin a new circuit!