There's a growing trend in the fitness space: film everything. Film your working sets for form checks, Film your PRs for social media, Film your warm-ups, your accessories, your stretching. Set up a tripod, angle your phone, hit record, and lift.
For some lifters, this works. But for most, it creates more problems than it solves. And as an approach to tracking your training, it has fundamental limitations that don't get talked about enough.
The practical friction is real.
Filming your sets in a commercial gym is not as simple as it sounds - you need to find a spot for your phone where it won't get knocked over or blocked by someone walking past. You need to angle it correctly, which changes for every exercise. You need to start recording before your set, stop it after, and check to make sure it turned out fine, which means being on your phone between every set.
For one or two key sets, this is manageable. For an entire workout? It's a significant amount of friction added to every lift. The whole point of training should be to train, not to worry about filming yourself.
Gym culture makes it awkward.
Not every gym is filming-friendly. Many lifters are uncomfortable training next to a camera. Some gyms have explicit policies against it. Even in gyms that allow it, setting up a tripod in a busy weight room during peak hours is not exactly frictionless.
This isn't a minor inconvenience. It changes the environment for everyone around you. And for lifters who train at busy commercial gyms, it can be a real barrier to using video as a consistent tracking tool.
Video gives you visuals, not data.
Here's the bigger issue. Even if you solve the practical problems, what do you actually get?
You get a video. What you don't get is numbers. You have to parse through each video, making assessment for each set and rep. Watching form, gauging control, and seeing how much effort you're putting in.
Video is useful for spotting major form breakdowns. It's terrible for tracking the subtle, rep-to-rep changes in tempo, fatigue, and bilateral performance that actually determine whether you're progressing.
The alternative: data from your wrists.
This is why I built Tensio as a wearable rather than a camera-based system. The bands sit on your wrists and capture movement data through sensors - no camera, no phone, no setup. You press a button, do your set, and the data is there.
Every rep is broken into its phases. Tempo is tracked automatically. Time under tension is calculated. Left and right side performance is compared. And all of it is numerical, objective, and directly comparable across sessions.
No tripod. No angles. No worrying about who's in the background. No watching 45 minutes of footage after your workout to find the one set you wanted to review.
If you don't want to have anything on your wrists while you lift, that's fine too. Tensio's tech can be attached straight to the bar or attachment you're using. Your training, your way.
Filming has its place.
I'm not saying you should never film a set. A video of a PR attempt is totally worth having. A form check video can be genuinely useful. There are moments where seeing yourself lift matters.
But as a system for tracking your training, filming doesn't scale. It adds friction to every session, produces subjective data, and creates an experience that's more about documentation than training.
The whole point of Tensio is to eliminate friction. You put the bands on, you train, and the data is captured automatically. No setup, no cleanup, no audience. Just you and the weights, which is how training should feel.