People are using Google Gemini for workouts — I’m a personal trainer, and here’s what happened when I tried it – 1v1 Video Chat & LIve Streaming & Influencer Subscription

By Sam Hopes

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I asked ChatGPT to build me a 20-minute dumbbell ab workout — here’s what happened

I’m a personal trainer — ChatGPT built me a 15-minute mobility routine for looser hips, and I’m surprised by the results

Why I ditched ChatGPT for Gemini — and the 5 prompts that sealed the deal

I kept it deliberately semi-vague to see how in-depth Gemini might go with the response, and how creative it could be off the cuff. Here’s exactly what I was given, and my verdict as a trainer. Coaching cap firmly on, this is what I really think.

What 5-move dumbbell workout did Google Gemini share?
“Here’s a five-move full-body dumbbell workout designed for an experienced individual like yourself,” Gemini tells me. Thanks, Gemini.
“This workout provides a solid foundation for a full-body session using just dumbbells. You can adjust the rest times between sets (e.g., 60-90 seconds) based on your conditioning and the intensity of the weights used.”
It even asked me if I wanted modifications or another type of workout.
Here’s what Gemini programmed:
Dumbbell goblet squat

Focus: Quadriceps, glutes, hamstrings, core
Sets & reps: 3-4 sets of 8-12 repetitions
Hold one dumbbell against your chest with both hands, cupping the top head of the dumbbell
Stand with feet shoulder-width apart, toes slightly pointed out
Brace your core and keep your chest up
Lower into a squat, pushing your hips back and bending your knees as if sitting into a chair
Go as deep as your mobility allows while maintaining a neutral spine
Drive through your heels to return to the starting position, squeezing your glutes at the top.
Dumbbell bent-over row

Focus: Lats, rhomboids, traps, biceps
Sets & Reps: 3-4 sets of 8-12 repetitions
Hold a dumbbell in each hand with palms facing each other (neutral grip)
Hinge at your hips, keeping a slight bend in your knees, until your torso is nearly parallel to the floor
Keep your back straight and core engaged. Let the dumbbells hang directly below your shoulders
Pull the dumbbells toward your lower chest and upper abdomen, squeezing your shoulder blades together at the top
Slowly lower the dumbbells back to the starting position with control.
Dumbbell bench press

Focus: Chest (pectorals), shoulders (anterior deltoids), triceps
Sets & Reps: 3-4 sets of 8-12 repetitions
Lie on a flat bench (or the floor) with a dumbbell in each hand, palms facing forward, hands just outside your shoulders
Press the dumbbells straight up toward the ceiling until your arms are fully extended, but don’t lock your elbows
Slowly lower the dumbbells back down to the sides of your chest, feeling a stretch in your pectorals
Ensure your elbows are tucked slightly (about 45 degrees from your body) to protect your shoulders.
Dumbbell overhead press

Focus: Shoulders (deltoids), triceps, upper traps, core
Sets & Reps: 3-4 sets of 8-12 repetitions
Stand with feet shoulder-width apart, holding a dumbbell in each hand at shoulder height, palms facing forward
Brace your core and glutes to maintain a stable torso
Press the dumbbells directly overhead until your arms are fully extended, but don’t lock your elbows
Slowly lower the dumbbells back to the starting position with control
Avoid leaning excessively.
Dumbbell Romanian deadlift (RDL)

Focus: Hamstrings, glutes, lower back
Sets & Reps: 3-4 sets of 8-12 repetitions
Stand tall with a dumbbell in each hand, palms facing your thighs
Keep a slight bend in your knees
Keeping your back straight and core tight, hinge at your hips, pushing your glutes back as the dumbbells descend along your shins
Lower until you feel a good stretch in your hamstrings, typically when the dumbbells are around mid-shin level
Avoid rounding your back
Engage your glutes and hamstrings to pull yourself back up to the starting position, maintaining a straight back.
In the video above, we demonstrate with a barbell. Simply replace with dumbbells and perform the same movement pattern.
Here’s what I like and dislike about the dumbbell routine
I kept it vague, but I was still slightly disappointed that Gemini went very basic with the routine, despite my sharing that I am a personal trainer who is very familiar with strength training.
The exercises above are great dumbbell moves to include in your routine, but I would put this routine down as a beginner-friendly dumbbell workout if you’re just starting out in the gym.
Gemini also kept it basic when referring to the target muscles, failing to mention the full array of muscles working, including some stabilizer muscles. That’s fine if you’re just looking for an overview — a legs or chest routine, for example — but not if you actually want the detail of your training regime and full range of benefits.
For example, the Romanian deadlift targets the erector spinae muscles of the lower back, which stabilize the spine isometrically (without flexion or extension). Secondary muscles include the adductors and some muscles that create stability, like the traps, core and rhomboids.

If you plan to program your workouts using Gemini or ChatGPT, remember that AI can’t replace a personal trainer or physiotherapist.
But it’s not all doom and gloom — Gemini picked compound exercises, making the routine efficient by using a traditional resistance style of training that can help you grow muscle over time. It provides sets and reps, and hits all major muscle groups.
Although Gemini doesn’t provide a warm-up or cool-down routine (to be fair, I didn’t ask), it does tell me to remember one. And also encourages me to adjust the weights to be challenging without losing form. Sound advice.
Gemini even tells me that adjustable dumbbells can help me switch between moves more easily — perfect timing for a set of the best adjustable dumbbells.
Did I expect a bit more detail about the movements, why they’ve been programmed and how I can scale them? yes. Do I have the right to be disappointed? Probably not. But the reason I kept it vague was that some people may not know the right questions to ask or the level of detail required for a proper and thorough routine.
If you plan to program your workouts using Gemini or ChatGPT, remember that AI can’t replace a personal trainer or physiotherapist, so you won’t get in-depth injury management, spotting, or adaptations — that’s down to a human touch.
Also, remember, if an exercise doesn’t feel right for you or you experience pain, you should stop and seek medical advice.
More from Tom’s Guide

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I use Gemini every day — here are 9 mind-blowing prompts I can’t live without
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Fitness Editor and Coach

Sam Hopes is a level 3 qualified trainer, a level 2 Reiki practitioner and fitness editor at Tom’s Guide. She is also currently undertaking her Yoga For Athletes training course.
Sam has written for various fitness brands and websites over the years and has experience across brands at Future, such as Live Science, Fit&Well, Coach, and T3.
Having coached at fitness studios like F45 and Virgin Active and personal trained, Sam now primarily teaches outdoor bootcamps, bodyweight, calisthenics and kettlebells.
She also coaches mobility and flexibility classes several times a week and believes that true strength comes from a holistic approach to training your body.
Sam has completed two mixed doubles Hyrox competitions in London and the Netherlands and finished her first doubles attempt in 1:11.

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