Collagen for athletes: what it does for joints and tendons
Collagen has a marketing problem. It's sold on skin and nails, so serious athletes tune it out. That's a shame, because the part that matters for training is all about what's under the skin.
Collagen is the main structural protein in your tendons, your ligaments and the connective tissue that holds your joints together. If you're loading those tissues hard week after week, collagen for athletes is worth understanding properly.
What collagen is and what it's for
Collagen is a protein, and a poor one for building muscle. It's low in leucine, the amino acid that drives muscle protein synthesis. For muscle, whey or a good spread of whole-food protein does the job.
Collagen's case is connective tissue. Tendons and ligaments are packed with collagen and slow to adapt, because their blood supply is poor compared with muscle. They take longer to get stronger and longer to recover. That's why so many running and hybrid-sport injuries turn out to be tendon problems.
The evidence worth knowing
The most cited work comes from Keith Baar's lab. In a controlled trial, athletes who took gelatin with vitamin C before a short bout of jumping showed roughly double the blood markers of collagen synthesis compared with placebo (Shaw et al., 2017).
The timing is the interesting part. They took the supplement about an hour before loading the tissue, so the building blocks were in the bloodstream when the tendon got the signal to adapt. Vitamin C is in the mix because collagen synthesis depends on it.
Reviews of collagen peptide supplementation point the same way for joint and connective tissue support, and they're honest that the field is young and the studies are often small (Khatri et al., 2021). Treat it as emerging evidence that's still building.
Where it fits for Hyrox and running
Hybrid training hammers connective tissue. Sled work, loaded lunges, thousands of foot strikes on the runs. Your muscles often adapt faster than the tendons and ligaments that have to transmit that force, and that gap is where niggling injuries live.
Collagen sits on top of a sensible training plan, good load management and your prehab. What it can do is support the connective tissue you're already training, the same way creatine supports the muscle you're already working.
If you've had Achilles, patellar tendon or plantar fascia trouble, connective tissue support is the part of recovery people most often forget.
How to take it
The research protocol used around 15g with a source of vitamin C, taken 30-60 minutes before loading the tissue you care about. That means before a run, a lower-body session or plyometrics.
Our Bovine Collagen comes in a 300g tub, with a daily serving of 10g. Mix it into whatever you already drink before a session, and a glass of orange juice covers the vitamin C.
Stick with it. Tendons adapt slowly, so judge collagen over months. It's a long game, like the tissue it supports.
Why bovine collagen
Collagen supplements come from a few sources: bovine (cattle), porcine, marine (fish) and chicken. They all give you the amino acids that make up collagen. Bovine is the workhorse. It's well sourced, good value and high in the glycine and proline that connective tissue is built from.
Marine collagen is sometimes sold as better absorbed. For an athlete the practical difference is small, and bovine usually gives you more grams per pound spent. For connective tissue, grams are what count.
Ease matters more than people expect. A dose you can drop into your pre-run coffee or juice is a dose you'll actually take three or four times a week. One you have to choke down ends up at the back of the cupboard.
How it sits next to your other recovery work
Collagen is one piece of the plan. Sleep is still the biggest thing you can do for tissue repair. Total protein across the day matters for everything, muscle included. Sensible progression, so your tendons have time to catch up with your muscles, prevents more injuries than any powder.
Think of collagen as the targeted piece you add once the basics are sorted. It supports one specific tissue that most recovery routines forget about. It's a useful job and a narrow one. Judge it on that and it earns its place.
The honest summary
If someone sells you collagen as a muscle builder or a miracle for your joints, be sceptical.
For what the evidence does support, helping the connective tissue that slow-adapting, injury-prone sports put under strain, it has a real and growing case. If you're a hybrid athlete with a tendon that grumbles, that's the bit to pay attention to.
Take it before you load the tissue, take it consistently and give it months. Then judge it on your own knees and Achilles.
For where it sits alongside the rest of your recovery, start here: best recovery supplements for Hyrox athletes.
Bovine Collagen is £18.99 for a 300g tub. Get Bovine Collagen.