Which method keeps people logging longer?
The closest evidence is a 2016 study of an incentive program for healthy behaviors. People who linked a device or app for automatic uploads were active for about 20 weeks of logging for exercise, while people who typed entries by hand were active for about 6 weeks. This was not a comparison with paper, and it was not about workout logs. The study was observational, so it cannot show cause, and people who connect devices may already be more motivated.
How accurate are paper logs?
A 2018 study followed 54 adults aged 45 or older with chronic knee pain for 12 weeks. Their paper exercise diaries were compared with a hidden accelerometer. The diaries overestimated exercise: a median of 220 exercises were reported against 176 measured. The two sets of numbers correlated only moderately.
The lesson is not that paper is bad. Any record you fill in from memory later can drift from what happened, so write each set down right after you finish it.
What are the practical pros and cons?
- Paper is simple, needs no battery and has no notifications. It is easy to lose, hard to search and cannot draw charts.
- An app can show your last performance while you log, remind you and keep a searchable history. It needs a phone in your hand, and it only helps if you actually enter the sets.
How should you choose?
Pick the method that fits how you train. If a phone distracts you, use paper. If you want charts and a history you can search, use an app. Try one for two weeks, and if you skip entries, switch.
What makes any log work?
- Record weight and reps for every set, right after the set.
- Use the same fields every session so you can compare.
- Review the last week before you plan the next one.
Roarer lets you log every set with weight and reps, shows your last performance while you log, and keeps your full history for review.