Masters Running

What changes and what does not

A 2008 review found endurance performance holds until about age 35, falls modestly until 50 to 60 and falls faster after that. The main driver is a steady fall in maximal oxygen uptake, with a fall in lactate threshold alongside it, while running economy, the energy cost of a given pace, does not change with age in endurance-trained adults¹. Part of the fall is the intensity and volume of training that older runners can no longer sustain, which is the part you can work on.

Training changes the rate. In a 2021 study of 40 runners who had each run a marathon in under 3 hours, the best marathon of each decade from the 1970s to the 2010s fell by less than 7% per decade, at least to age 60, in runners who kept training and racing consistently². That is a selected group of fast men, so it shows what is possible and not what is typical. These are group averages, and none of them is your own rate.

A runner who starts late still has years of improvement ahead before gains turn marginal. Do not train as if you were 30, and do not treat yourself as finished.

Build the week around two hard days

Run no more than two hard days a week, with the hard days at least two easy days apart and sometimes three. A typical week is four easy days, two hard days and a day off. If you recover slowly, stretch the pattern over nine or ten days so each hard or long session is followed by two easy days. The guide on periodization covers how the phases fit around it.

Build for two or three weeks and then take a lighter week. Some masters runners need the lighter week after two. The guide on training load and recovery covers the rhythm.

Put more low-intensity running in first. Many older runners do too much intensity and too little base, and for a 50-year-old the single most useful change is more easy running. Build the base, keep strength going, and add density of hard work after that, one capacity at a time. Patience is part of training.

Set easy by effort and by your own heart rate

Easy running is conversational, zone 2 in a five-zone model. Set it by effort and by your own heart-rate zones, not by the pace you used to run and not by a formula such as 220 minus your age. A hard 30-minute effort gives a usable threshold heart rate (see the guide on testing your lactate threshold heart rate), and the guide on heart rate zones shows how the zones are built from it.

Heart rate runs higher at a given pace as you age: maximum heart rate falls, stroke volume is lower, and less muscle means each fiber works at a higher share of its capacity. So do not hold the old easy pace and wait for heart rate to settle. Train at the heart rate and let the pace follow it, and slow down without arguing about it.

A higher heart rate at an unchanged easy pace is a question and not a verdict. Check heat and humidity, sleep, stress, caffeine, a new medication and fatigue before you decide that fitness has fallen. If heart rate, breathing and effort are all up and walk breaks do not fix it, cut the run short. If only the number is up and breathing and effort feel normal, look at those causes first. If it repeats over two or three runs, change the training or fix the cause.

When heart rate runs high on easy days, use run-walk: 2 minutes of running with 1 of walking, lengthening the running pieces over time as your heart rate allows.

Keep a small dose of hard running

Cardiorespiratory fitness falls with age, so keep VO2max-type work in the plan, in a small dose with a lot of easy running around it. Not everyone tolerates speed work on the road. If hard running leaves you sore for days, put the intervals on a bike, an elliptical or in the water, with the same effort. Some masters runners do one running workout and one cross-training workout a week, rotated across a few weeks.

Peak power falls with age, and very short hill strides plus lifting such as squats can hold it or improve it. Keep strides and hill strides in the week. They are short and controlled, so they are not hard running.

Strength is not optional

Lift heavy with few reps: four or five exercises in under 20 minutes, on the days you run hard, with no leg-taxing session before speed work or the long run. Do not drop it because recovery takes longer. Older runners lose muscle and rapid ankle push-off, and heavy strength is how you hold both. In a 2024 meta-analysis of strength programs in middle- and long-distance runners, running economy improved after high-load training (80 percent of one-rep max or more) and after combined methods, and not after submaximal-load training³.

Add plyometrics and impact for tendon and bone, for example 50 foot contacts before a track day. Add strength for the lower leg, the hips and the core, which take more of the load as you age, and single-leg work for balance. Lift at joint-friendly angles, often quarter range, and build toward heavy loads over time. The guide on strength training for runners has the details, and strength is more important, not less, through perimenopause and menopause (see the guide on training considerations for women runners).

Warm up with about five minutes of dynamic movement before a 45-minute run.

Recovery and racing

Recovery takes longer, and how long varies a lot between people. One runner bounces back from a marathon in a month to eight weeks, another needs four or five months, and you do not know which you are until you have done a few. Past 50, how many hard marathons a year you can sustain depends on recovery: food, sleep, hydration and strength. Do not chase several personal bests a year if you are new to the distance, injured or under-recovered.

If your times stall, change the event before you change the plan. A trail race, an uphill race or a 5K gives a fresh stimulus with no old time to chase. Six years of the same plan is not simply aging. A marathon block leaves little room for strength, plyometrics and intervals, so some masters runners do better racing the 5K to the half marathon.

Before you blame age

Look outside fitness first: sleep, food, injury and the rest of your life. Eat enough to support the training, and past 50 do not cut calories to lose weight during a training block. Many women over 40 eat too little protein, so make sure you get enough (the guide on daily nutrition covers how much).