Bodyweight training has one built-in problem. The load is fixed at your own mass, and there is nothing to add to it. The usual fix is to use the couch.

It is for changing the load, and the amount it changes it by has been measured.

The number that makes a surface useful

A force-plate study by Ebben and colleagues put 23 recreationally fit people through push-up variations and recorded how much of their body weight they were actually holding up.

  • Hands on a surface 60 cm high: about 40 percent of body weight
  • On the knees, hands on the floor: about 50 percent
  • Standard, hands and toes on the floor: about 65 percent
  • Feet up on a surface 30 cm high: about 70 percent
  • Feet up on a surface 60 cm high: about 75 percent

Read that as a dial. The same movement, with nothing bought and nothing added, spans from 40 to 75 percent of your body weight depending on which surface in your flat you put your hands or your feet on. That is nearly double the load, from furniture you already own.

The published points are 30 and 60 cm. I would not interpolate between them or extrapolate past them, since those heights were not among the ones measured, but the direction is not in doubt: hands higher is lighter, feet higher is heavier.

Measure the furniture

Whether the room is big enough is a different question and two other guides answer it: measure your space before you buy for the clear zone, and workout corner without a spare room for the wall run. Assume the room is fine and take a tape to the furniture instead. It takes about a minute.

Start with the one fixed surface every flat has: the kitchen worktop. Measure it rather than assuming a figure.

Then write down four numbers:

  1. The worktop. The highest of the four, and the lightest useful setting.
  2. A windowsill, a table edge or a chair back. Usually somewhere between.
  3. A sofa seat or a sturdy chair seat. The low rung, and the one closest to the 60 cm point in the study.
  4. The floor. Zero, and the standard setting.

Four heights, four settings on the dial. Anything stable that does not slide is a candidate; anything that rolls, tips or has a loose top is not, and a chair on a hard floor slides more than people expect. A door frame belongs on the list too, though it works differently: you push against it rather than onto it, so it gives you isometric holds instead of a height.

I would not train against a radiator, a windowsill with a loose board, or a tall shelf unit that is only anchored to the wall at the top. The test is whether you would trust it to hold your weight with somebody else’s hands on it.

What each height unlocks

The dial is not only for push-ups. Most patterns have a version that runs against a raised surface, though the height does not work the same way in each.

  • Push. Worktop, then table, then chair seat, then floor, then feet up on the chair. Five settings from one movement.
  • Pull. The hardest pattern without equipment, because a flat rarely gives you a good one. A row under a solid table works for some people and depends entirely on the table.
  • Hinge and squat. Height works upside down here: a higher seat makes a sit-to-stand easier, a lower one harder, and going to one leg does more than any height change.
  • Step and lunge. The step height is the load. A stair in the building is usually the most useful raised surface you have, and it is already there.
  • Core. Height barely matters. This is the one pattern where tempo and limb position do the work instead, and those are covered in quiet apartment workouts.

I would run one pattern per session against two adjacent heights, the easier one for volume and the harder one for the last set.

The three-minute case for a fixed sequence

Japan’s Radio Taiso is a broadcast calisthenics routine done daily by a very large number of people, and it is worth stealing for one reason: it is fixed. Same moves, same order, about three minutes, no decision to make.

It is also rated. Under Japan’s Physical Activity Standards for Health Promotion 2013, Set 1 is 4.0 METs and Set 2 is 4.5, which puts a three-minute fixed sequence in the moderate band.

The part worth copying is the fixed order. A sequence you never have to choose gets done on the evenings when a session you have to design does not. Pick four movements, one per pattern, fix the order, and stop redesigning it. My own bias is that people rebuild their programme far more often than they need to, and that the rebuild is usually a way of putting the session off.

Where the dial runs out

It does run out.

The push pattern ends when feet on the highest safe surface stops being hard, and the measured ceiling for that is around three quarters of your body weight. The pull pattern ends earlier, and I would call it the weak point of the no-equipment case, because a rented room tends not to have a solid overhead or under-table anchor. The squat and hinge patterns last longest, because single-leg versions keep giving.

When two of your patterns have run out, that is the day equipment starts earning its floor space, and the order to buy it in is in what fitness equipment is worth buying first. Before that day, you do not need anything except a mat, which is worth having on hardwood from the first session.

Noise is a separate constraint with its own answers, and it changes what you should do at ten in the evening rather than what you should own: that is in quiet apartment workouts. With an injury or a medical condition, check with a clinician before you start.

Take the tape to four surfaces this evening.

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