Mobility After 50: What Actually Declines and What's Worth Your Ten Minutes

After 50, many triathletes notice that something has changed. Getting into a wetsuit takes longer, looking over your shoulder on the bike feels stiffer, and the first kilometre of a run feels creakier than it used to. The usual response is to add a stretching routine and hope. The better question is what is actually changing, which parts of it are worth training, and how to spend a small amount of time well.

This article sits alongside TriForward's "Strength Training After 50: Why Power Matters More Than Strength", which covers the loss of muscle power with age. Here the focus is range of motion, stiffness and balance. If you want the warm-up question instead, TriForward's "Should You Stretch Before You Run?" covers pre-run stretching, and "Foam Rollers and Massage Guns" covers recovery tools.

Most of the evidence below comes from people who are not athletes: sedentary older adults, community-dwelling people in their seventies and young university students. That gap is real, and it is flagged throughout.

What "mobility" means here

Mobility is used loosely. In research it usually means one of three things:

• Range of motion (ROM): how far a joint can move, usually measured passively, with someone else moving the limb, or actively, using your own muscles.
• Stiffness: how much a muscle-tendon unit resists being stretched. It isn't the same as range, and it can change without range changing.
• Balance and control: whether you can use the range you have, steadily and under load.

A triathlete needs a bit of all three. Shoulder flexion and rotation for the catch and recovery in the swim. Hip flexion to close the hip angle on a time-trial bike. Ankle movement for running and kicking. And balance for the less glamorous parts: transitions, uneven trail running, and stepping out of the water onto a slippery ramp.

What actually declines: the 6,000-person Flexitest dataset

The most detailed picture of how flexibility changes across the lifespan comes from a 2013 study by Medeiros, Araújo and Araújo in the journal Age. They analysed 6,000 people aged 5 to 92 (3,835 men and 2,165 women) assessed at one clinic in Rio de Janeiro between 1978 and 2011. Athletes, dancers and people with relevant diseases were excluded.

Each person was scored on the Flexitest, which rates 20 passive movements from 0 to 4. The scores were summed into seven joint groups and an overall index. The main findings:

• Overall flexibility fell with age, by about 0.8% a year in men and 0.6% a year in women.
• Women were more flexible than men at every age.
• The loss was joint-specific. The share of overall flexibility coming from the shoulders and trunk fell markedly with age, while elbow and knee mobility were relatively better preserved. In men, the shoulder's share of the total fell from 13.9% at age 28 to 5.2% at age 85.
• The pattern started shifting around age 30 in men and 40 in women.
• Age explained only about half to 60% of the variation. Plenty of older people were more flexible than plenty of younger ones.

The authors suggested that the joints people use through a full range in daily life may hold their mobility better. That is plausible, but it is a hypothesis, not something the study tested.

There are clear limits. The study was cross-sectional, so it compares different people at different ages rather than following the same people as they aged. The sample was mostly white and from higher socioeconomic groups in one city, and it had no detailed data on physical activity. The paper also has some internal inconsistencies in how a few numbers are reported, so the exact percentages are less important than the overall pattern.

Inference: for a triathlete, the joints that lose the most in this dataset, the shoulders and trunk, are the ones the swim depends on. Hips also lost relative share. That doesn't mean your shoulders will stiffen, but it does suggest where to look first.

Stiffness and balance

Range of motion is only part of the picture. Balance tends to decline with age too, and in older adults it is linked with falls, which is where most of the research effort has gone. For an athlete in their fifties or sixties who still runs and rides, a fall on the bike or a stumble on a trail is rarely about flexibility. It's about reacting quickly, holding a single-leg position and having the strength to catch yourself.

That distinction matters, because a stretching routine and a balance routine train different things. The next sections look at the evidence for each.

Is range of motion still trainable after 50?

The short answer is yes, as far as the evidence goes. The largest recent analysis is a 2024 systematic review and meta-analysis by Konrad and colleagues in the Journal of Sport and Health Science. It pooled 77 studies with 3,870 healthy participants and found:

• Regular stretching produced a moderate increase in range of motion compared with controls (effect size about 1.0).
• Age didn't significantly predict the size of the gain. Neither did training status: elite athletes, recreationally active people and sedentary people improved by similar amounts.
• Static stretching and PNF (proprioceptive neuromuscular facilitation, the contract-relax style of stretching) produced larger gains than ballistic or dynamic stretching.
• Women gained more than men.
• Weekly frequency and total stretching time weren't significant moderators either.

The caveat for this article is that the mean age of participants was only 27. The finding that age didn't matter is reassuring, but it rests on relatively few older participants.

A 2012 systematic review by Stathokostas and colleagues looked specifically at adults over 65. They found 22 intervention studies and concluded that flexibility training may improve range of motion. But the link to functional outcomes, such as walking, getting up from a chair or daily tasks, was conflicting. Protocols, joints and measures varied so much that the authors couldn't make firm recommendations.

So range of motion responds to training at any age studied. Whether that range translates into better function is less certain.

Does stretching do anything else?

A 2023 meta-analysis by Arntz and colleagues in Sports Medicine asked whether chronic static stretching also builds strength and power. It included 41 studies of healthy people across the lifespan:

• Flexibility improved substantially (standardised mean difference 0.96).
• Strength and power improved only slightly, with trivial-to-small effects (0.21 and 0.19).
• Older participants and sedentary participants gained more strength than younger and recreationally active ones.

Inference: for a sedentary 70-year-old, stretching may give a small strength stimulus. For a trained masters triathlete who already lifts, any strength benefit from stretching is likely to be negligible. Stretch for range, not for strength.

Strength training also improves range

A 2021 review by Afonso and colleagues in Healthcare compared strength training directly with stretching. It pooled 11 randomised controlled trials with 452 participants and found no difference in range-of-motion gains between the two. The trials were very varied in their populations and protocols, so the conclusion is cautious, but it points in a useful direction.

Inference: strength exercises that move through a full range, such as deep split squats, Romanian deadlifts and overhead presses, may improve mobility at the same time as building the strength and power that decline after 50. For a time-limited athlete, that is two benefits from one session.

Falls: where the evidence is strongest

The best-quality evidence on exercise in older people concerns falls. A 2019 Cochrane review led by Catherine Sherrington included 108 randomised trials with 23,407 participants living in the community. Their mean age was 76, and 77% were women. Compared with control:

• Exercise overall reduced the rate of falls by 23% (rate ratio 0.77), with high-certainty evidence.
• Balance and functional exercise reduced the rate of falls (rate ratio 0.76), also with high certainty.
• Programmes combining several types, usually balance and functional work plus resistance training, gave a rate ratio of 0.66, with moderate certainty.
• Tai chi gave a rate ratio of 0.81, with low certainty.
• No trials compared flexibility-only exercise with a control group.

Inference: a rate ratio of 0.76 means about 24% fewer falls, and 0.66 means about 34% fewer. These are older, mostly female, non-athletic people, so the numbers won't transfer directly to a 55-year-old triathlete. But the direction is clear: the evidence for preventing falls sits with balance and strength, not with stretching alone.

What this means for masters triathletes

Putting these sources together gives a fairly consistent picture, with a large population gap:

• Flexibility declines, but unevenly, and the shoulders, trunk and hips seem to lose the most.
• Range of motion remains trainable, through stretching or strength work through a full range.
• More range doesn't automatically mean better function. In older adults the link is conflicting.
• Balance and strength have the strongest evidence for the outcome that matters most later in life: staying on your feet.

None of these studies tested masters triathletes. A trained athlete may start with better range and balance than the people studied, which could mean smaller gains, or a different starting point altogether.

Where to spend ten minutes

The following is TriForward's inference from the evidence above, not a tested programme. If you have about ten minutes, three or four times a week, consider splitting it roughly like this:

1. Balance, about three minutes. Single-leg stands progressing to eyes closed, single-leg reaches, or slow step-downs. Hold onto something at first.
2. Strength through range, about four minutes. A slow, deep split squat or rear-foot-elevated split squat, a Romanian deadlift with a light weight, and a controlled overhead reach or press.
3. Targeted stretching, about three minutes. Pick the one or two areas your sport needs most: thoracic rotation and shoulder flexion for swimming, hip flexors and hamstrings for the aero position, calves for running. Static or contract-relax stretches held for 30 to 60 seconds.

If you already lift twice a week, fold the strength part into those sessions and use the ten minutes for balance and the stretches that matter to you. The Konrad meta-analysis didn't find that more frequent or longer stretching gave bigger gains, so consistency over months probably matters more than any particular dose.

A triathlon scenario

The following example is illustrative, not drawn from a study. A 58-year-old man has done Olympic-distance triathlons for 15 years. He swims twice a week, rides three times and runs twice. He has noticed that his breathing to the right has become awkward, his shoulders feel tight in the wetsuit, and he wobbles in T2 when pulling on his run shoes.

Based on the evidence above, he might:

• Prioritise thoracic rotation and shoulder flexion for his stretching time, since those are the areas most relevant to his swim and most likely to have lost range.
• Add single-leg balance work two or three times a week, attached to the end of a run or the start of a gym session.
• Use full-range strength exercises, rather than adding a separate long stretching session.
• Get a swim technique check, since a breathing problem may be technique as much as mobility. TriForward's "Filming Your Stroke" covers what video can show.

Common mistakes

• Assuming stiffness is inevitable and untrainable. Range of motion responded to training in every age group studied.
• Stretching everything. Ten minutes spread across the whole body does little for any one joint. Focus on the joints your sport needs.
• Treating flexibility as falls prevention. The falls evidence supports balance and strength, not stretching alone.
• Forcing end-range positions. A stretch should feel like tension, not pain. Sharp pain, pins and needles or a joint that catches is a reason to stop.
• Dropping strength work for mobility work. Strength training improved range as much as stretching in the Afonso review and builds the power that declines with age.

Men, women and mobility

Women were more flexible than men at every age in the Flexitest data, and their decline was slightly slower. In the Konrad meta-analysis, women also gained more range from stretching than men did. The falls review was 77% women. Inference: older men may have the most to gain from mobility work and are also the least well represented in the falls research. Women entering menopause may face changes in bone and muscle that make strength and balance work more important; TriForward's "Menopause and the Triathlete" covers what is known.

What we don't know

• Whether mobility training improves triathlon performance in masters athletes. No study has tested it.
• How trained older athletes respond. The trials are in sedentary or recreationally active people, mostly young for stretching and mostly in their seventies for falls.
• Whether better range reduces injury. Reviews in younger athletes haven't shown that stretching prevents injury, and nothing tests it in masters triathletes.
• How individual joints age in active people. The Flexitest data were cross-sectional and excluded athletes.
• The minimum dose for older adults. Most dose analyses come from younger people.

References

• Medeiros HBO, Araújo DSMS, Araújo CGS. Age-related mobility loss is joint-specific: an analysis from 6,000 Flexitest results. Age, 2013;35(6):2399–2407. doi:10.1007/s11357-013-9525-z
• Konrad A, Alizadeh S, Daneshjoo A, Hadjizadeh Anvar S, Graham A, Zahiri A, et al. Chronic effects of stretching on range of motion with consideration of potential moderating variables: a systematic review with meta-analysis. Journal of Sport and Health Science, 2024;13(2):186–194. doi:10.1016/j.jshs.2023.06.002
• Stathokostas L, Little RMD, Vandervoort AA, Paterson DH. Flexibility training and functional ability in older adults: a systematic review. Journal of Aging Research, 2012;2012:306818. doi:10.1155/2012/306818
• Arntz F, Markov A, Behm DG, Behrens M, Negra Y, Nakamura M, et al. Chronic effects of static stretching exercises on muscle strength and power in healthy individuals across the lifespan: a systematic review with multi-level meta-analysis. Sports Medicine, 2023;53(3):723–745. doi:10.1007/s40279-022-01806-9
• Afonso J, Ramirez-Campillo R, Moscão J, Rocha T, Zacca R, Martins A, et al. Strength training versus stretching for improving range of motion: a systematic review and meta-analysis. Healthcare, 2021;9(4):427. doi:10.3390/healthcare9040427
• Sherrington C, Fairhall NJ, Wallbank GK, Tiedemann A, Michaleff ZA, Howard K, et al. Exercise for preventing falls in older people living in the community. Cochrane Database of Systematic Reviews, 2019;(1):CD012424. doi:10.1002/14651858.CD012424.pub2