Sixty minutes is how long a personal training session should last. At VAULT Training, Brandschenkestrasse 150, 8002 Zürich (Enge), every session is 60 minutes because that is what it takes to warm up with approach sets, do five minutes of power work and get through 16 quality sets with the rest they need. I get asked about shorter formats every week, and my answer hasn’t changed: we don’t sell a 30-minute version.
Where the 60 minutes go
Every VAULT session has the same four blocks. The proportions shift with the client. The order doesn’t, and I’m strict about that.
Minutes 0 to 10: warm-up. Two or three minutes of light cardio, then dynamic mobility (inchworms, world’s greatest stretch, a reverse lunge with a reach overhead), then core and glute activation: a plank, a Pallof press, a glute bridge, a lateral band walk. The last piece is the one most gyms skip and I never do: approach sets with the day’s main lift. If Romanian deadlifts are on the plan, you do them with the empty bar first, then light, then heavier, and only then at the working weight.
Minutes 10 to 15: power. About five minutes of jumping, landing or throwing. For a beginner that’s a deep lunge with a pause at the bottom and a controlled skater step; further along it’s pogo hops, a broad jump with a stuck landing or a medicine ball throw. I put it early because it needs a fresh nervous system; tacked on at the end, it turns into tired hopping, and I’ve watched that happen often enough.
Minutes 15 to 57: strength. Forty to forty-five minutes, and this is the session. Exercises are grouped in threes: A1, A2, A3 for three or four rounds, then B1, B2, B3. A1 might be a dumbbell bench press, A2 a goblet squat, A3 something I pick specifically for you (direct glute work, a rotator cuff drill, a loaded carry). Across the A and B blocks you get 16 hard sets, each taken to between 4 and 0 reps in reserve. Nobody leaves without their 16.
Minutes 57 to 60: metcon, if it’s on the plan. Two or three minutes of an AMRAP or an EMOM, mostly for my fat-loss clients, on a bike, a rower or with bodyweight. On some fat-loss days it takes over the back half of the hour.
Your coach logs every set, load and rep before you’ve reached the shower. At VAULT you train with the studio, not with one person, so the next coach picks up exactly where I left off. The full structure is on the method page.
The A1/A2/A3 pairing is why an hour is enough
Rest isn’t dead time. When trained lifters rested 3 minutes between sets instead of 1, with everything else equal, the 3-minute group gained more strength and more quadriceps thickness over eight weeks (Schoenfeld et al., 2016). Longer rests means more reps at the same load, and that extra volume is what grows muscle.
Sixteen sets with 2 to 3 minutes of rest each is 40 to 48 minutes of resting alone. That doesn’t fit in an hour.
Unless you don’t sit down.
A horizontal push and a knee-dominant exercise share almost no local fatigue. So you press, walk to the rack, squat, do your A3, and by the time you’re back at the bench three minutes have passed and your pressing muscles are recovered. Same sets, same rest quality, half the clock time. That one design decision is why 60 minutes works, and it’s part of the method I’d defend hardest.
Why 30 minutes falls short
Count it out with me. Warm-up plus approach sets is 12 to 15 minutes for someone about to lift something heavy, and it’s the one part I won’t remove. That leaves 15 to 18 minutes for the strength block: six to eight hard sets at real rests. Half the dose.
You can’t buy back missing sets with intensity. At 0 to 4 reps in reserve you’re already near the limit per set; what’s missing is the number of sets. Even the review written for people with no time recommends a minimum number of hard sets per muscle each week, warm-ups restricted to the exercise you’re about to do, and paired exercises to halve the clock time (Iversen et al., 2021). That is the A1/A2 structure, and it still needs the hour.
The previous version of this article called 30-minute sessions “a cheaper option”. I no longer agree with that line. They’re cheaper per session and more expensive per result. We don’t offer them.
Why 90 minutes adds little
The first five hard sets of a session are the most productive ones. By set 15 to 20 the quality of each set has dropped and technique is drifting; I can see it from across the floor before the client feels it. We don’t run 24-set sessions, and the weekly count matters more than the daily one: the same volume spread over two sessions grows more muscle than piled into one (Schoenfeld, Ogborn and Krieger, 2016).
A 90-minute slot plus travel is also a two-and-a-half-hour hole in a working day, and lack of time is one of the most commonly reported reasons people give up on exercise altogether (same Iversen review). A session you can keep for 36 weeks beats one you skip in week six. I’ve seen more programs die of a calendar than of a bad exercise choice.
What changes is frequency, not length
The 16 doesn’t move. What moves is how many weeks it takes to bank 36 sessions:
- 3 sessions a week: 16 × 3 × 12, done in 12 weeks
- 2 sessions a week: 16 × 2 × 18, done in 18 weeks
- 1 session a week: 16 × 1 × 36, done in 36 weeks
Once a week works, slowly. Sixteen sets across four movement patterns leaves each muscle near maintenance volume for the week, so progress is real but measured in months, and I’d rather say so at the assessment than in week eight. If you’re weighing frequency against budget, how much a personal trainer costs in Zürich goes through the maths.
How long should a personal training session last when you’re eight minutes late?
Fifty-two minutes, and in my experience this happens more often than the full hour does. Tram, meeting, school pick-up. What I do with the missing eight:
Cut: the opening cardio and most of the general mobility. You’re already warm from walking in, and I compress the dynamic work to two movements.
Never cut: the approach sets. The empty-bar RDL, the squat at 40 percent, the light row before the heavy row. This is where I check the pattern before I load it, and it’s what keeps your back happy at working weight.
Also protected: the 16. If the clock makes that impossible, the strength block gets denser before it gets shorter (a lighter A3, one fewer round of B), and the metcon is the first thing I drop.
What changes the shape of the hour
Someone in their sixties, or coming back from an injury, gets the full ten minutes of warm-up and a longer approach ladder, and the power block shrinks to pay for it. A beginner spends the first eight sessions learning to brace and to hinge at the hip, with more reps in reserve, because loading a pattern you haven’t learned yet is how people get hurt. In more than fifteen years of coaching I haven’t met a client who regretted those eight sessions. Same hour, different ratio of teaching to loading.
Frequently asked questions
Is a 30-minute personal training session enough?
Not for strength or body composition work. After a warm-up with approach sets, 30 minutes leaves room for six to eight hard sets, half of the 16 a VAULT session is built around. We don’t sell it.
Is 45 minutes of personal training enough?
For a trained client with a short warm-up, 45 minutes holds 12 to 14 hard sets if exercises are paired. It’s a compromise, not a standard, and it breaks the moment you arrive late.
Is personal training once a week enough?
Enough to progress, not enough to progress quickly. Sixteen sets a week sits close to maintenance volume per muscle, so the same 36 sessions take 36 weeks instead of 12. If once a week is what your life allows, it beats zero by a wide margin.
Does a longer session burn more fat?
No. Fat loss comes from the calorie deficit, the muscle you keep by lifting, and the steps you take in the other 23 hours. A longer session mostly adds fatigue, and in my experience often lowers the steps.
The trial session is a real one: 60 minutes, warm-up to last set, so you can see the clock work for yourself. Book a free trial and bring training shoes.