The decline bench press is a great exercise for targeting the lower chest muscles. Here is a simple workout routine using the decline bench press: 1. Warm up: Start with a 5-10 minute warm up of light cardio to get your blood flowing and muscles warmed up. 2. Decline bench press: Start with a light weight to warm up, then gradually increase the weight for each set. Aim for 3-4 sets of 8-12 reps. 3. Incline dumbbell press: This exercise targets the upper chest muscles. Perform 3-4 sets of 8-12 reps. 4. Decline dumbbell flyes: This exercise isolates the chest muscles and helps to improve muscle definition. Perform 3-4 sets of 10-15 reps. 5. Tricep dips: Finish off your workout with some tricep dips to target the triceps. Perform 3-4 sets of 10-15 reps. Remember to always use proper form when performing these exercises and listen to your body to avoid injury. It's also important to gradually increase the weight as you get stronger to continue challenging your muscles.