Most people who start strength training in their sixties or seventies do it too easily.
Not through laziness. Through entirely reasonable caution, and because almost nobody explains what the right level actually feels like.
So they pick a weight that feels safe, do twelve repetitions, put it down, and do the same thing for the next six months.
That maintains. It does not build.
Here is what the research says about how hard, and about something else that matters just as much and gets left out of almost every program.
The Intensity Question
Contemporary evidence based recommendations for resistance training in older adults suggest working at roughly 70 to 85 percent of your one repetition maximum, meaning 70 to 85 percent of the heaviest weight you could lift once, for one to three sets per exercise.
In practical terms, that is a weight you could lift somewhere around six to twelve times before form breaks down. Not twenty five.
And the evidence supports the heavier end for strength. A dose response meta analysis of resistance training in older adults found strong effects in a dose dependent manner, with high intensity training more effective than moderate intensity, and moderate more effective than low, for building maximal strength.
So if your goal is to get stronger, heavier works better. That is reasonably clear.
The Nuance That Matters
Here is where it gets more interesting, and more encouraging.
The same meta analysis found that while higher intensities were superior for maximal strength, gains in functional outcomes were independent of training intensity.
Read that again. Getting stronger on a test responds to heavier loads. Getting better at the things you actually care about, like walking and standing from a chair, appeared to improve regardless of how heavy the training was.
Which has a practical implication. If heavy lifting is not available to you, because of a joint problem, a medical consideration, or simply because you are not comfortable with it, that does not mean you cannot improve your function. You can.
It does mean the strength gains will be smaller, and strength matters for its own reasons including bone health and reserve.
You Do Not Need Percentages
A genuinely useful finding for anybody trying to apply this at home.
Researchers compared four different ways of deciding when to increase the weight: repetition maximum, rating of perceived exertion, percentage of one repetition maximum, and repetitions in reserve.
They found no significant differences between the methods on any strength or functional performance outcome.
But the perceived exertion group found the training significantly more tolerable and enjoyable than the other groups.
The authors concluded that the perceived exertion method appears to be the optimal approach for older adults, precisely because it is more tolerable and enjoyable, and those are two of the main factors determining whether people keep going.
Which is the practical answer to how hard. You do not need to calculate a one repetition maximum. You need a weight that feels genuinely hard by the last two or three repetitions, while your form still holds.
A useful guide: if you finish a set feeling you could comfortably have done another eight, it is too light. If you cannot complete the set with good form, it is too heavy.
Progressive Means It Has to Change
This is the part most commonly missed.
A program that stays the same maintains. It does not build.
Progression means something increases over time. More weight, more repetitions, more sets, or less rest. Usually weight.
A reasonable approach: when you can complete all your sets at the top of your repetition range with good form and the last repetitions no longer feel hard, increase the load.
Expect that to happen every two to four weeks early on, then less frequently as you progress.
And write it down. Without a record you will not notice that you have been lifting the same weight since July.
The Thing Almost Every Program Leaves Out
Now the part that may matter most for anybody over 65, and that very few programs include.
Muscle power declines earlier and faster than muscle strength with age.
Power is force times speed. It is not how much you can lift. It is how quickly you can produce force.
And it is the quality that matters most for the things that protect you. Catching yourself when you stumble. Getting out of a chair quickly. Stepping out of the way. Climbing stairs at a normal pace.
Reactions have to be fast, and a muscle that is strong but slow cannot produce force in the window available.
The evidence is striking. That same dose response meta analysis found power training more effective than traditional progressive resistance training for improving both muscle power and functional outcomes.
And comparison trials have found that the same load, the same volume and the same total work, performed quickly rather than slowly, produces substantially different power outcomes.
Which means slow, controlled strength training, performed exactly as most people are taught, builds strength while under developing power.
How to Train Power Safely
This is not about lifting heavy things fast and hoping.
The principle: a moderate load, lifted with intent to move quickly, then lowered slowly and under control.
Encouragingly, you do not need heavy loads for this. A systematic review examining power training intensity in older adults found that low to moderate intensity power training produced similar power gains to high intensity power training, though higher intensity was better for building maximal strength.
What it looks like in practice:
Sit to stands performed quickly on the way up, controlled on the way down.
Step ups driving up with intent.
Leg press or squats with a fast concentric phase, moderate load.
Heel raises performed briskly.
And progressions toward small hops or quick stepping where appropriate.
Done fresh, early in the session, not at the end when you are tired.
And introduced progressively and with supervision, particularly if you have joint problems, osteoporosis, balance difficulties or any cardiovascular considerations.
A Reasonable Weekly Structure
Two strength sessions, 20 to 30 minutes, covering lower body, upper body and trunk, loaded to the point of genuine effort and progressed every few weeks.
Some power work within those sessions, performed early and fresh.
Balance practice, five to ten minutes most days.
And aerobic activity, built up and maintained.
Before You Start
Speak with your physician before beginning a new resistance training program, particularly if you have cardiovascular risk factors, osteoporosis, uncontrolled blood pressure, retinopathy, recent surgery, or have been inactive for a long period.
Stop and seek urgent medical care for chest pain or pressure, unusual breathlessness, dizziness, fainting, or pain spreading into the jaw, neck or arm during exertion.
And get assessed first if you have joint pain that limits you, a history of falls, or you are not confident about technique.
Let Us Set the Right Level
The two most common errors are training too light and never progressing. Both are easy to fix once somebody has measured where you actually are.
Morgain Physical Therapy offers a Free Discovery Visit at no cost and no obligation. You will get an assessment of your strength, power and movement here in Grand Forks, a starting load set appropriately rather than cautiously, and a progression plan so your program keeps working rather than stalling.
Book your Free Discovery Visit today. Or call us on (701) 599-3848.