assistant: Certainly, I apologize for the informal language in my previous response. Here is a formal workout plan for you to follow that utilizes only dumbbells, and focuses on different muscle groups each day with a rest day on Sunday.

Day 1: Upper Body and Core

1. Warm-up: Begin with 5-10 minutes of light cardio exercise (such as jogging in place or jumping jacks) to get your heart rate up and your muscles warmed up.

2. Dumbbell Bench Press: 3 sets of 10-12 reps. Lie down on a bench or the floor and hold the dumbbells with your palms facing away from you. Push the dumbbells up toward the ceiling, then lower them down to your chest.

3. Bent-Over Dumbbell Row: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing each other. Bend forward at the waist, keeping your back straight, and lift the dumbbells up toward your chest.

4. Standing Dumbbell Shoulder Press: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells at shoulder height with your palms facing forward. Push the dumbbells up toward the ceiling, then lower them back down.

5. Dumbbell Bicep Curl: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing forward. Curl the dumbbells up toward your chest, then lower them back down.

6. Tricep Kickback: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing each other. Bend forward at the waist, keeping your back straight, and lift the dumbbells up behind you. Straighten your arms behind you, then lower the dumbbells back down.

7. Plank: 3 sets of 30-60 seconds. Get into a push-up position, but instead of lowering your body, hold your body in a straight line from your head to your toes, with your forearms on the ground.

8. Russian Twists: 3 sets of 10-12 reps. Sit on the floor with your knees bent and your feet flat on the ground. Hold the dumbbell with both hands, then twist your torso to the left and right.

9. Cool Down and Stretch: Take 5-10 minutes to stretch the muscles you just worked out.

Day 2: Lower Body and Core

1. Warm-up: Begin with 5-10 minutes of light cardio exercise (such as jogging in place or jumping jacks) to get your heart rate up and your muscles warmed up.

2. Goblet Squat: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbell at chest height with both hands. Lower yourself into a squat, keeping your knees above your toes, then stand back up.

3. Dumbbell Lunges: 3 sets of 10-12 reps. Hold the dumbbells with your palms facing each other and step forward with one foot, lowering yourself into a lunge. Step back, then repeat with the other leg.

4. Romanian Deadlift: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing your body. Bend forward at the waist, keeping your back straight, and lower the dumbbells toward the ground. Stand back up, keeping your back straight.

5. Calf Raises: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing your body. Lift your heels off the ground, then lower them back down.

6. Plank: 3 sets of 30-60 seconds. Get into a push-up position, but instead of lowering your body, hold your body in a straight line from your head to your toes, with your forearms on the ground.

7. Russian Twists: 3 sets of 10-12 reps. Sit on the floor with your knees bent and your feet flat on the ground. Hold the dumbbell with both hands, then twist your torso to the left and right.

8. Cool Down and Stretch: Take 5-10 minutes to stretch the muscles you just worked out.

Day 3: Total Body

1. Warm-up: Begin with 5-10 minutes of light cardio exercise (such as jogging in place or jumping jacks) to get your heart rate up and your muscles warmed up.

2. Dumbbell Squat and Press: 3 sets of 10-12 reps. Hold the dumbbells with your palms facing each other, and lower yourself into a squat. As you stand back up, push the dumbbells up toward the ceiling.

3. Dumbbell Deadlift: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing your body. Bend forward at the waist, keeping your back straight, and lower the dumbbells toward the ground. Stand back up, keeping your back straight.

4. Dumbbell Bench Press: 3 sets of 10-12 reps. Lie down on a bench or the floor and hold the dumbbells with your palms facing away from you. Push the dumbbells up toward the ceiling, then lower them down to your chest.

5. Bent-Over Dumbbell Row: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing each other. Bend forward at the waist, keeping your back straight, and lift the dumbbells up toward your chest.

6. Dumbbell Bicep Curl: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing forward. Curl the dumbbells up toward your chest, then lower them back down.

7. Tricep Kickback: 3 sets of 10-12 reps. Stand with your feet shoulder-width apart, holding the dumbbells with your palms facing each other. Bend forward at the waist, keeping your back straight, and lift the dumbbells up behind you. Straighten your arms behind you, then lower the dumbbells back down.

8. Plank: 3 sets of 30-60 seconds. Get into a push-up position, but instead of lowering your body, hold your body in a straight line from your head to your toes, with your forearms on the ground.

9. Russian Twists: 3 sets of 10-12 reps. Sit on the floor with your knees bent and your feet flat on the ground. Hold the dumbbell with both hands, then twist your torso to the left and right.

10. Cool Down and Stretch: Take 5-10 minutes to stretch the muscles you just worked out.

Rest Day: Sunday

On Sunday, take a break from your workouts and allow your body to rest and recover. Make sure to stay active and get some light exercise, such as taking a walk.

assistant: Here is a three day dumbbell workout plan: 
Day 1: Upper Body
- Dumbbell bench press - 3 sets of 10-12 reps
- Dumbbell rows - 3 sets of 10-12 reps
- Dumbbell shoulder press - 3 sets of 10-12 reps
- Dumbbell bicep curls - 3 sets of 10-12 reps
- Tricep kickbacks - 3 sets of 10-12 reps
Day 2: Lower Body
- Goblet squats - 3 sets of 10-12 reps
- Dumbbell lunges - 3 sets of 10-12 reps per leg
- Dumbbell deadlifts - 3 sets of 10-12 reps
- Calf raises - 3 sets of 10-12 reps
Day 3: Total Body
- Dumbbell bench press - 3 sets of 10-12 reps
- Dumbbell rows - 3 sets of 10-12 reps
- Dumbbell lunges - 3 sets of 10-12 reps per leg
- Dumbbell deadlifts - 3 sets of 10-12 reps
- Dumbbell bicep curls - 3 sets of 10-12 reps
- Tricep kickbacks - 3 sets of 10-12 reps
- Calf raises - 3 sets of 10-12 reps
Each workout day includes:
- Warm-up: 5-10 minutes of light cardio (e.g., jogging in place, jumping jacks) followed by some dynamic stretching (e.g., arm circles, shoulder rolls)
- Rest: 30-60 seconds between sets
- Plank - 3 sets of 30-60 seconds
- Bicycle crunches - 3 sets of 30 - 60 seconds
Some final notes to keep in mind regarding exercise:
- If you notice an exercise is becoming easier, increase weight or duration.
- Exercise can be challenging, but you need to constantly challenge yourself to see results.
- What you eat is important. If you eat too little, you won't see any muscle gain.