Drop sets and back-off sets are first-class concepts in RepCanvas, not workarounds you have to invent yourself. The workout logger has dedicated affordances for both, and each behaves the way it should in volume math and personal-record tracking - without you having to think about it.
Drop sets
A drop set continues the same exercise immediately after a main set, with reduced load and no rest. Used at the end of a working set, drop sets push the muscle past failure under sub-maximal load - common in terminal hypertrophy blocks, mechanical drops, and double-drop protocols.
In the workout logger, a drop set is added under a main set row. It renders below the main set, indented, with its own weight and rep cells and a clear marker so you can read the structure of the exercise at a glance.
How drop sets are treated in the data:
- They count toward total volume and total tonnage for the session.
- They do not count toward the “all main sets logged” check that triggers the session-complete prompt - drops are inherently optional.
- They do not count toward personal-record detection. PRs are tracked from main sets only, so a drop after failure does not produce a misleading top-set record.
This split matches how most lifters actually use drop sets - as additive volume rather than a measured working effort. The logger reflects that without you having to configure anything.
Back-off sets
A back-off is a regular working set added after a top-set effort, performed at lower load. The classic pattern is one heavy top set followed by two or three back-offs at twenty per cent below top weight. Back-offs are common in strength templates that need volume work after a single heavy attempt, and in hypertrophy templates that periodise around an intensity day.
Back-offs are modelled as ordinary main sets with a lower prescribed weight. They count toward main-set volume, count toward the “all sets logged” check, and contribute to personal-record detection like any other main set. There is no special status - the program prescribes them at a different load and the logger treats them accordingly.
When to use which
If the work continues at no rest with a single load drop, that is a drop set. If the work happens after a normal rest at a lower prescribed load, that is a back-off. The distinction is small but it matters for how the app counts the work.
If you are running a custom program, the program builder lets you prescribe back-offs at the program level. Drop sets are added at the moment of the lift, in the workout logger.
Where to read next
- How the workout logger works covers the logger surface and how every set is saved.
- Mid-workout changes covers adding sets that propagate forward into the program.
- Strength trends covers how logged sets feed long-running progress signals.