The video arrives as a nine-second portrait clip filmed from the front, the bar is cut off at both ends, and it is the empty-bar warm-up rather than the set that mattered. You watch it four times, write five corrections, and next week the same client sends the same clip with the same knee collapse.
Two things are going wrong, and neither is the client's fault. You never told them exactly how to film, and you sent back more corrections than any person can hold in their head under a loaded bar.
Be clear about what a form check is and is not
A form check assesses movement: joint positions, bar path, range, tempo, where the set breaks down. That is it. It is a technique tool.
If a client reports pain in a lift — not soreness, not "it feels awkward", pain — that is not a cueing problem and you cannot solve it from a video. Refer them to a physiotherapist or their GP, pull or substitute the movement in the meantime, and coach around it once you know what you are working with. Programming around client injuries covers what to do with the rest of the block while they wait for an appointment. Diagnosing pain from a phone clip is outside your scope of practice, and being confidently wrong about it is the fastest way to lose a client and your insurance.
The second boundary is quieter. A form check is not a general assessment of whether someone is training well. Effort, consistency, load progression and recovery all sit in the check-in, not in the video. Keep them separate or every clip turns into a twenty-minute review.
Tell them exactly what to film
Vague requests get vague video. "Send me a squat video" produces a warm-up set from whatever angle the phone happened to be leaning at. Ask for four specific things.
A working set, not a demonstration. Technique that holds at 60% tells you almost nothing. Ask for the last set of the exercise, or any set at roughly RPE 8 — the set where the pattern is under enough load to break. If a client only ever sends light sets, you are reviewing a movement they can already do.
All the reps. A single rep hides the thing you most want to see, which is what changes between rep one and rep six. Film the whole set, from the walk-out to racking the bar.
Landscape, phone on the floor. A phone turned sideways and propped against a water bottle or a plate keeps the whole body and both ends of the bar in frame from two or three metres away. Portrait is the exception, not the default: use it only for overhead work and pull-ups, where the bar leaves the top of a landscape frame.
The right distance and the right angle. Two to three metres for most lifts. Close enough that you can see foot position and the bar knurling, far enough that nothing is cropped when they move. The angle is the part clients get wrong most often, so give it to them per lift rather than as a principle.
Camera setup by lift
Send this once, as a standing instruction, and stop re-explaining it. Camera height means the phone propped at that height on the floor, not held.
| Lift | Angle | Camera height | Distance | Must be in frame |
|---|---|---|---|---|
| Back squat | 45° from the front corner | Hip | 2.5–3 m | Feet, both ends of the bar, full depth |
| Deadlift | Side-on, square to the bar | Hip | 2.5–3 m | Head to feet, both plates, the floor |
| Bench press | Side-on, level with the chest | Chest | 2 m | Bar path, elbows, feet on the floor |
| Overhead press | Side-on (portrait) | Hip | 2.5 m | Feet to lockout above the head |
| Romanian deadlift | Side-on | Hip | 2.5 m | Hips, bar, knees, feet |
| Split squat or lunge | 45° from the front corner | Knee | 2 m | Both feet, front knee, torso |
| Pull-up or chin-up | Side-on (portrait) | Hip | 2.5 m | Feet at the bottom, chin at the top |
Two rules that apply to every row. Nothing between the camera and the lifter — no rack upright, no gym bag, no training partner walking through. And film in landscape unless the row says portrait.
If a lift is going badly and one angle is not settling it, ask for the same set filmed from a second angle next session rather than a longer clip from the same one. Side-on tells you about the hinge, bar path and spinal position; the 45° corner tells you about knees, stance and rotation. You rarely need both, but when you do, you need them from the same set.
Make the instruction a one-off, not a weekly reminder
The reason form checks quietly die is that every one of them costs you a paragraph of setup. Write the filming instructions once and put them where the client will see them at the moment they need them, which is in the gym, on the exercise.
In Fitsly, that means the written instructions on the exercise itself, so the filming angle sits alongside the demonstration video the client already opens mid-workout, and asking them to send the clip from the workout screen so the session is attached to the message — training then gives you the video and the set-by-set log in one place instead of a clip with no context. Whatever you use, the principle holds: the instruction lives with the lift, not in a message you retype every month.
Then set a rhythm. One nominated lift a week, rotating, is enough for most clients and it gives you a comparable clip of every main movement every four to six weeks. Asking for everything produces nothing.
Review at volume without losing your evening
Reviewing videos one at a time as they land is what makes form checks feel like a second job. Batch them: one window, all the clips, same process each time. The same logic that makes writing programs for multiple clients faster applies here — the cost is in the switching, not the work.
Watch each clip twice. Once at full speed, no pausing, to see the set as a whole and find the rep where things change. Once at quarter or half speed on that rep only. If you are scrubbing back and forth more than twice, the video is not good enough to judge and the honest response is to say so and ask for a better one.
Then look in a fixed order, because a fixed order stops you noticing whatever is most visually obvious and calling it the problem:
- Position at the start. Stance, grip, set-up, bracing.
- The path. Where the bar or the body travels, and whether it stays there under fatigue.
- Range. Are the reps the depth or lockout you programmed, and is rep six the same as rep one.
- Tempo. Where it accelerates, where it stalls, where control disappears.
Note what you see for that client, not just what you send them. Next month's clip is only useful if you can remember what last month's looked like, and "knee collapse on the last two reps at 100 kg" is the note that makes the comparison possible.
One cue, not five
This is the part that decides whether the whole exercise is worth doing. Most form-check feedback fails because the coach sends five corrections at once and the client applies none of them. Five cues under a heavy bar is not coaching, it is a reading comprehension test, and the client responds by trying to do everything, doing nothing, and feeling worse about a lift they were previously happy with.
Pick one. Usually the one furthest upstream — the set-up fault that causes the three faults you saw later. Fix that, see the next video, then pick the next one.
Name what you want them to do, not what you want them to stop doing. "Stop letting your knees cave" gives someone nothing to execute; "push your feet out into the floor as you stand up" is an action they can attempt on the next rep. Cues that describe a fault make people self-conscious. Cues that describe an action make them move.
The shape that works is three lines: what was good, the one change, and what to send next.
That set looked strong and the depth was consistent all six reps. One thing for next session: push your feet out into the floor as you stand up — you will feel it in your glutes on the way up. Same lift, same angle, top set, and send it through so I can compare.
Format matters less than length, but it does matter. A voice note lets you use tone and emphasis and takes you forty seconds instead of the four minutes you would spend writing the same thing carefully enough not to sound blunt. Keep it under a minute. Video of yourself doing the movement is worth it when the cue is spatial and words are failing you, and not otherwise. Text is the right choice when the client will need to re-read it in the gym — anything numeric, like a stance width or a load change, should be written down even if the rest was spoken.
Be honest about what you cannot see
A phone video is a single-plane, low-frame-rate view of one set on one day. It is enough to coach from and it is not enough to be certain with.
You cannot see how heavy the set felt, so ask. You cannot see what a joint is doing under a hoodie or a squat suit, so ask for a fitted top for the clips that matter. You cannot see whether the client had slept, warmed up or trained legs the day before, all of which change what you are watching. And a rep that looks ugly at the end of a hard top set may be entirely appropriate — technique that degrades slightly under real fatigue is normal, and calling it a fault teaches clients to leave effort on the table.
When the video genuinely does not settle the question, say so and change the input rather than guessing harder. Ask for a lighter set to see the pattern without the load hiding it, a second angle, or a video call where you can talk them through it live. And when the technique does hold at the top set, that is your signal to progress the exercise rather than to keep looking for something to correct.
