Does collagen help rugby players and footballers?
For the ligaments, tendons and joints that a contact and sprint sport loads every week, the trial evidence says collagen may help, and there is one short trial suggesting it may reduce soreness after damaging exercise. It will not stop a tackle from hurting, and it is no substitute for the carbohydrate, creatine and complete protein a match actually runs on. Rugby and football share a load profile that is different from any endurance sport: repeated sprints and decelerations, cutting and pivoting on a planted foot, and (in rugby especially) collision. The injuries that follow are named after ligaments and tendons: ACL, MCL, hamstring tendon, groin, ankle. This page sets out what the two sports do to connective tissue, the dose and timing the research used, what the trials show (including the one that found no effect) and how a ready-to-drink 20g sachet and a collagen + creatine sachet fit a match week.
What rugby and football do to connective tissue
The knee first. Cutting, side-stepping and landing from a header or a lineout put the anterior cruciate and medial collateral ligaments under the kind of rotational load that no other tissue in the body is designed to take. ACL injury is the most serious non-contact injury in both codes and takes the best part of a year to come back from; MCL sprains are more common and quicker, but still cost weeks. The patellar tendon carries every jump and every deceleration. Behind the knee, the hamstring tendons and the hamstring-to-bone junction are the single most common injury site in professional football, and sprinting at full speed under fatigue is when they go. The groin (adductor tendons) and the ankle ligaments (lateral sprains from a bad landing or a tackle) round out the list.
Rugby adds two things: mass and contact. Heavier players load their tendons and joints harder in every sprint and scrum, and repeated collisions produce bruising, muscle damage and a level of whole-body soreness that turns a 48-hour recovery into a four-day one. Footballers get a version of the same thing from the eccentric load of decelerating 50 or more times a match. Both sports play at least weekly through a nine-month season, so connective tissue rarely gets the months it takes to fully remodel. Tendon and ligament are type I collagen with slow turnover and a poor blood supply; muscle keeps up with the season, and the tendons lag.
The protocol: dose and timing for rugby and football
The research protocol is to take 15β20g of hydrolysed collagen with vitamin C 30β60 minutes before the session that loads the tissue, so that glycine and proline peak in the blood while the ligaments and tendons are working, and to hold a smaller daily dose for months. For team-sport players creatine is well established: 3β5g a day supports repeated sprint performance and strength work, and the safety record is long.
| When | How much | Why |
|---|
| 30β60 min before training, speed work, gym or a match | 15β20g hydrolysed collagen with vitamin C | Shaw 2017 pre-loading window; Lee 2023 dose-response up to 30g |
| Recovery and rest days | 5β10g | Dose used in the 12- to 24-week joint and tendon trials |
| Creatine monohydrate | 3β5g daily, all season | Kreider 2017 maintenance dose; Antonio 2021 on safety |
| Around a match or contact session | 20g daily for the days either side | Clifford 2019 soreness protocol |
| Minimum commitment | 8β12 weeks; ideally the full season | Tendon and ligament adapt over months |
Collagen is low in leucine and does not replace whey or food for muscle repair after a match. Treat it as a ligament-and-tendon addition on top of normal team-sport nutrition. The full breakdown is in collagen dosage for athletes.
What the trials show
Pre-loading and ligaments. Shaw 2017 gave 15g of gelatin plus vitamin C an hour before six minutes of jump-rope exercise: blood markers of collagen synthesis roughly doubled against placebo, and ligaments engineered from the participants' serum were stiffer and had more collagen. For a sport whose worst injuries are ligament injuries, that engineered-ligament result is the most interesting finding in the field, even though it is a laboratory measure rather than a clinical outcome. Lee 2023 tested 0g, 15g and 30g and found the response scaled with dose.
Ankles and tendons. Dressler 2018 gave 5g of collagen peptides a day for six months to people with chronic ankle instability and found improved ankle stability, which is directly relevant to players with a history of lateral sprains. Jerger 2022 combined 5g daily with 14 weeks of calf strength training and found greater Achilles cross-sectional area than placebo. Praet 2019 found 2.5g daily for six months with eccentric rehab improved outcomes in Achilles tendinopathy.
Knees and joints. Zdzieblik 2017 gave 5g daily for 12 weeks to young, active adults with activity-related knee pain and found greater pain reduction during activity than placebo. Clark 2008 gave 10g of collagen hydrolysate daily for 24 weeks to athletes with joint pain and reported significant improvements, most clearly in those with knee pain.
Soreness and strength. Clifford 2019 gave 20g of collagen peptides a day for nine days around a bout of drop jumps and found lower muscle soreness at 48 hours, which is the closest trial to the day after a match. Zdzieblik 2015, Kirmse 2019 and Jendricke 2019 each paired 15g daily with 12 weeks of resistance training and reported greater gains in fat-free mass and strength than training alone; modest, but at a dose players would use anyway.
Creatine. Kreider 2017, the ISSN position stand, sets 3β5g a day as the maintenance dose and reviews decades of safety data. Antonio 2021 works through the myths (kidneys, cramping, water retention) and finds them unsupported. Avgerinos 2018 reviews evidence that creatine may support cognitive performance under stress, which is relevant to decision-making in the last twenty minutes.
The honest null result. Aussieker 2023 gave 30g of collagen protein immediately after resistance exercise and measured connective-tissue protein synthesis in muscle: no increase compared with placebo. Two lessons: take collagen before the session, not after, and do not expect it to build muscle. The long-term trials with loading are the evidence; the acute post-session effect is not there.
How KUDU fits a match week
Team-sport players are the hardest athletes to get a supplement into: training is at a club ground, the kit bag is already full and nobody carries a shaker to a Tuesday session. KUDU's 20g Liquid Collagen Protein is a 63ml ready-to-drink sachet: 20,000mg of hydrolysed bovine collagen (type I and III), 85 kcal, 0g sugar, 0g fat, dairy free and gluten free. Drink it in the changing room 30β60 minutes before warm-up. Four flavours (Sour Cherry, Peach, Orange, Strawberry & Vanilla), made in the UK, and Informed Sport certified: every batch is tested for banned substances, which is the standard drug-tested players and their clubs need.
For gym days and heavy contact players the Collagen + Creatine sachet combines 10g hydrolysed collagen, 5g creatine monohydrate and vitamin C in a 44 kcal mix-with-water sachet (Mixed Berry or Tropical). It is not Informed Sport certified, so squads under anti-doping rules should use the certified 20g shot and a certified creatine. A box of 14 liquid sachets is Β£34.95, from Β£1.99 a sachet on subscription; the Β£12 Sampler Box has all four flavours. 60-day money-back guarantee, 4.8 stars from 480+ verified reviews.
A rugby and football weekly collagen plan
| Day | Collagen | Creatine | Timing |
|---|
| Match day | 20g sachet | 3β5g in the morning | 60 min before warm-up, if practised in training |
| Match +1 (recovery) | 20g sachet | 3β5g | Morning; the Clifford 2019 soreness window |
| Gym or strength day | C+C sachet (10g) | 5g (in C+C) | 30β60 min before |
| Speed, agility or contact session | 20g sachet | 3β5g | 30β60 min before |
| Skills or tactical session | 10g (half a sachet) | 3β5g | Any time |
| Rest day | 10g | 3β5g | Any time |
| Return from a ligament or tendon injury | 20g before every rehab session | 3β5g | Follow the physio's plan; collagen supports it |
Rugby and football guides
Collagen for rugby and football: FAQs
Does collagen help with ACL recovery?
There is no trial of collagen in ACL rehabilitation, so nobody can honestly say yes. The closest evidence is Shaw 2017 (pre-loaded gelatin increased collagen content in engineered ligaments) and the six-month ankle and Achilles trials. Collagen may support the tissue during a physio-led rehab; the rehab does the work.
Should I take collagen before or after a match?
Before, 30β60 minutes ahead of the warm-up, the same as the pre-loading trials. Aussieker 2023 found a large dose after resistance exercise did not raise connective-tissue protein synthesis, so the post-match priority is carbohydrate and a complete protein, with another collagen dose the next morning for the soreness window.
Can I take collagen and creatine together for rugby?
Yes. Creatine (3β5g a day, Kreider 2017) is one of the best-supported supplements for repeated sprint and collision sports, and collagen works through a different route. The C+C sachet puts both in one drink for gym days.
Is KUDU safe for drug-tested players?
The 20g liquid collagen shot is Informed Sport certified, meaning every batch is tested for substances banned in sport. That is the certification most UK governing bodies and clubs look for. The Collagen + Creatine sachet is not yet Informed Sport certified, so drug-tested players should use the shot with a separately certified creatine. Keep the batch number from the box in case you are ever asked.
Does collagen help hamstring tendon problems?
No trial has looked at hamstrings specifically. The Achilles trials (Praet 2019, Jerger 2022) suggest collagen may support tendon adaptation alongside loading, and hamstring rehab is built on progressive eccentric loading, so the fit is reasonable. Treat it as support for the programme, not a shortcut through it.
Other sports: runners, Hyrox, CrossFit, cyclists, the gym. Browse the full liquid collagen range and the Collagen + Creatine collection.
