Improve VO2 Max After 60

After 60, fitness can feel like something to hold onto rather than build. Humanic Blue looks at research on aerobic training in older adults, including what kinds of training moved the number.

VO2 max measures how much oxygen your body can use during hard exercise. It can improve after 60: a 2005 review found an average gain of about 16% with endurance training in sedentary groups whose average age was at least 60. Newer trials do not identify one intensity as universally superior, and they do not establish hard intervals—bouts of harder exercise separated by easier recovery periods—as necessary for everyone. For readers hoping to live longer, the evidence has a limit: fitter people have lower death rates in observational studies, but the training trials here do not establish that raising VO2 max extends life. Program suitability depends on health, conditioning and supervision.

How much can VO2 max improve after 60?

A 2005 meta-analysis pooled 41 controlled trials in sedentary adults whose study-group average age was 60 or older. The pool mixed randomized and nonrandomized controlled studies, and the review methods were incompletely reported.

• Average gain: about 16% compared with control groups. The oxygen-use units behind that figure are explained below.
• Program comparison: studies using more than 20 weeks of training at moderate intensity tended to report larger gains.

Those program features came from comparisons between studies, not random assignment of individuals to different durations and intensities. They are clues, not proof of a personal optimum. The main conclusion—that regular aerobic training can improve aerobic fitness after 60—has held up in more recent randomized evidence.

What is a fitness gain linked to?

VO2 max is often expressed in milliliters of oxygen used per kilogram of body weight per minute (mL/kg/min). Another unit, the metabolic equivalent or MET, represents 3.5 of those units—roughly resting oxygen use. The average training gain in the older review was 3.78 mL/kg/min, or about one MET.

A 2009 meta-analysis combined 33 observational cohorts. Each one-MET higher measured fitness level was associated with a 13% lower relative risk of death from any cause and a 15% lower relative risk of coronary heart disease or cardiovascular events. These percentages compare risks between fitness levels; they are not percentage-point reductions in an individual’s risk.

These are associations between people’s fitness levels, not trial results. They don’t show that raising your own VO2 max by one MET will lower your risk by 13%. Where your number sits for your age is covered in Good VO2 Max by Age.

What separates an observed fitness-survival association from a demonstrated effect of training?

What kind of training produced gains?

Moderate, steady training. The older synthesis found larger gains in studies using roughly 60% to 70% of VO2 max for more than 20 weeks. Those programs were studied, but the comparison did not establish a best dose for an individual.

Intervals. A 2024 meta-analysis included 23 randomized trials in older adults. After accounting for how much exercise participants actually completed, the review could not clearly link higher intensity to greater fitness gains. Direct high-versus-moderate comparisons showed only a small, statistically uncertain advantage for high intensity. The authors’ evidence synthesis challenges the idea that harder is inherently better; regular aerobic work was the more consistent signal.

The decline curve. Aerobic capacity declines faster with each decade, especially in men, so part of what training does after 60 is offset a steeper slope. That’s covered in Improve VO2 Max After 50.

Is hard training safe after 60?

One large safety dataset came from people with diagnosed heart disease in supervised rehabilitation—not from unscreened adults over 60 exercising alone. A 2012 Norwegian retrospective study followed about 4,800 cardiac-rehabilitation patients, averaging about 58 years old and mostly men, through supervised exercise. Participants had a medical examination and maximal test before training, and each person took part in both intensity types.

• Moderate training: 1 fatal cardiac arrest in 129,456 hours.
• High-intensity intervals: 2 non-fatal cardiac arrests in 46,364 hours, or 1 per 23,182 hours.
• Heart attacks: none.

These are different events. The National Heart, Lung, and Blood Institute explains that cardiac arrest means the heart suddenly stops pumping; a heart attack occurs when blood flow to heart muscle is blocked. An arrest count is therefore not a heart-attack count.

The absolute event count was low, but three events are far too few to establish that the two formats are equally safe. The crude event rate was higher during interval hours, and the study was not randomized by intensity. A 2018 systematic review of 23 cardiac-rehabilitation studies found one major nonfatal cardiovascular event during 17,083 interval sessions among the interval participants. These selected, tested and monitored patients show what supervised rehabilitation can achieve; they do not establish the safety of unsupervised hard intervals in the general population.

The American College of Sports Medicine’s screening approach considers current activity, symptoms, known heart or blood-vessel disease, metabolic disease such as diabetes, or kidney disease, and intended intensity. Age alone does not require clearance for every person, but known disease, symptoms or a plan to jump from inactivity to vigorous intervals changes the decision. Stop and seek evaluation for chest pressure or pain, lightheadedness, fainting, palpitations, or unusual or extreme breathlessness.

How far can safety findings from supervised cardiac rehabilitation travel beyond that setting?