Garmin HIIT Custom Intervals: Why the Next Round Waits for Lap

You opened the HIIT activity, chose Custom, and filled in a move time, a rest, a number of moves and a number of rounds. The work interval ended, the watch switched to rest, and the rest counted up. The next round sat there until you pressed lap.

Garmin puts two interval tools on the same watch, and they do not advance the same way. The built-in HIIT timers are one. A saved workout is the other. Custom's Moves and Rounds fields also mean something other than the words on the screen, which is where a lot of these sessions get stuck.

What the HIIT activity offers

The fēnix 7 owner's manual lists the HIIT activity as a free, unstructured session, four timers, and saved workouts. The Venu 3 and Instinct 2 manuals describe that same list. Custom, including on the Forerunner 55, is the timer where you set move time, rest time, number of moves and number of rounds.

The other three timers are named formats. AMRAP records as many rounds as possible during a time you set. EMOM records a set number of moves every minute on the minute. Tabata alternates 20 seconds of maximum effort with 10 seconds of rest. If you want that middle format unpacked on its own, EMOM meaning is the longer version of the word.

After you press start, the manual says the watch shows a countdown and your current heart rate. You can press LAP when you want to move to the next round or rest yourself. On the Venu 3 that control is the back button. The manual treats the press as a manual skip during a countdown. It never describes a rest that counts up and stays there.

Why the rest counts up

A fēnix 7 owner set Custom with a three-minute rest. When the work interval ended, the watch went to rest and counted up, and the next round waited for the lap button. A Venu 2 Plus owner hit the same wait and found the labeling. In Custom, Moves behave like the rounds you meant to set, and Rounds behave like sets wrapped around those rounds.

Rest between moves counts down, and the next move starts on its own. Rest between rounds counts up and waits. The single block they spelled out is a straight Tabata: 20 seconds on, 10 seconds off, eight times, entered as 8 moves and 1 round. Set that way, they said each rest counted down and the next move started without a button.

Stack several of those blocks by raising the round count, and the rest between the blocks is the count-up again. The Venu 2 Plus owner still had to advance that rest by hand, and had not found a setting that removed it. This is what those owners worked out on a fēnix 7 and a Venu 2 Plus. If your Custom rest already counts down through a single block, Moves and Rounds are already in the arrangement that worked for them.

A saved workout advances on its own

The same fēnix 7 owner got a second answer that also worked: build the work and the rest as a custom workout, with a duration on each step and a repeat count. When the step ends, the watch moves on. Garmin Connect builds those workouts from steps, up to 50 in one workout, and a group of steps can repeat up to 99 times. You start it from the HIIT activity, where the manual lists Workouts beside the timers.

An Epix 2 owner who wanted the next round to start by itself took a different route. They built a separate interval activity, and that one did advance. It also kept GPS on for the whole session, mapped their walking around the gym, and stored a distance on each interval. A reply on that thread said strength and HIIT do not use GPS by default, and asked whether the workout had been saved as a HIIT workout. If you are indoors, start the saved workout from the HIIT activity. That is the list the manual gives you, and it is the place that reply pointed to.

Garmin's support page adds a limit that is easy to miss. On some devices the activity timer stops when the last step finishes, and you resume it yourself if you want the recording to keep going. Some music-enabled models can play a note you record, up to 15 seconds, when a step changes. The note is a clip you make while editing the workout.

When a separate timer is the simpler clock

Stay on the Garmin when the session is one block, or when the record is the point. Heart rate on the wrist, the file in Connect, a split for each step: Custom with the repeats stored as moves covers a straight 20/10, and a saved workout on the HIIT activity covers a repeat that leaves the rest by itself, including a long rest between blocks.

A separate timer fits when the session is several different blocks and you are done pressing lap between them, or when each interval is a station you want named out loud. Peak Interval is that clock. You set a preparation phase, then work and rest, nest a repeated set inside a longer block, and name the phase so the cue can say what is next. It runs on the phone and on Apple Watch, with a sound and a wrist tap at each change, and the next interval starts when the rest ends.

You can keep the Garmin record alongside it. Start a free HIIT session on the watch if you want that activity saved in Connect, and let the other timer call the changes. One is storing the effort. The other is telling you the interval turned over.

Which one to start

For one flat block you want on the Garmin, use HIIT Custom with the repeats in Moves and Rounds left at 1. For several blocks that should advance on their own and still land in Connect, use a saved workout from the HIIT activity. For a session whose stations change, and a rest you do not want to dismiss by hand, use a timer that names each phase and starts the next one when the rest hits zero.

Lap is a fair way to skip ahead when you finish a move early. It is a clumsy way to begin every rest. If that is what Custom is asking for, the Moves field or a saved HIIT workout fixes it on the watch. A dedicated timer covers the session those two tools still leave open.