Create an exercise routine for me. I want to work out 3 times a week for 50 mins each. I want to focus on the arms, chest, back, and legs. I want to gain strength and also lose around 500 calories with each exercise. Also, include any video demonstrations if possible. Most exercises should include adjustable dumbbells. Please include some cardio at the beginning of each routine.

Sure, here's a 3-day per week workout routine that focuses on arms, chest, back, and legs while incorporating cardio and using adjustable dumbbells. Each session is approximately 50 minutes long and aims to help you gain strength while burning around 500 calories. I'll provide exercise descriptions along with links to video demonstrations where available.

Day 1: Upper Body and Cardio Duration: Approximately 50 minutes

1. Cardio Warm-up (5-10 minutes): Jump rope or brisk walk/jog to elevate your heart rate and warm up your muscles.

2. Push-Ups (3 sets of 10-15 reps): Focus on proper form and control. If needed, perform modified push-ups (knees on the ground).

3. Dumbbell Rows (3 sets of 12 reps each arm): Target your back muscles. Video demonstration: Dumbbell Rows

4. Dumbbell Bench Press (3 sets of 10 reps): Strengthen your chest muscles. Video demonstration: Dumbbell Bench Press

5. Dumbbell Bicep Curls (3 sets of 12 reps each arm): Focus on biceps. Video demonstration: Dumbbell Bicep Curls

6. Tricep Dips (3 sets of 12 reps): Use a stable surface for dips. Video demonstration: Tricep Dips

7. Cardio Finisher (5-10 minutes): High-intensity interval training (HIIT) - alternate between 30 seconds of jumping jacks and 30 seconds of high knees.

Day 2: Legs and Cardio Duration: Approximately 50 minutes

1. Cardio Warm-up (5-10 minutes): Jumping jacks or stationary cycling to warm up.

2. Goblet Squats (3 sets of 12 reps): Hold a dumbbell close to your chest while squatting. Video demonstration: Goblet Squats

3. Dumbbell Lunges (3 sets of 12 reps each leg): Strengthen your legs. Video demonstration: Dumbbell Lunges

4. Deadlifts (3 sets of 10 reps): Focus on proper form and technique. Video demonstration: Dumbbell Deadlifts

5. Leg Press (3 sets of 12 reps): If you have access to a leg press machine, use it to target your leg muscles.

6. Cardio Finisher (5-10 minutes): Running stairs or hill sprints for an intense cardio workout.

Day 3: Full Body and Cardio Duration: Approximately 50 minutes

1. Cardio Warm-up (5-10 minutes): Jump rope or jogging to get your heart rate up.

2. Dumbbell Shoulder Press (3 sets of 10 reps): Strengthen your shoulder muscles. Video demonstration: Dumbbell Shoulder Press

3. Bent-Over Rows (3 sets of 12 reps): Target your upper back. Video demonstration: Bent-Over Rows

4. Dumbbell Lunges (3 sets of 12 reps each leg): Repeat from Day 2 to engage leg muscles.

5. Plank (3 sets of 30-45 seconds): Strengthen your core. Video demonstration: Plank

6. Burpees (3 sets of 10 reps): A full-body cardio exercise. Video demonstration: Burpees

7. Cardio Finisher (5-10 minutes): Tabata-style sprints - 20 seconds of all-out effort followed by 10 seconds of rest, repeated for 4 minutes.

Remember to adjust the weights used for each exercise to match your fitness level. It's important to maintain proper form throughout to prevent injuries. If you're new to exercise or have any health concerns, consider consulting a fitness professional or healthcare provider before starting a new workout routine.