I usually wear a watch during exercise or when sleeping. I usually wear a watch during exercise or when sleeping.

It is thea smart watch connecting to my mobile phone. It is a smart watch connecting to my mobile phone.

It is thea smart watch connecting to my mobile phone. It is a smart watch connecting to my mobile phone.

It would sound even better to use "it's" here. Using contractions will help your English sound much more natural in general

It is the smart watch's a Galaxy Watch 7 that connectings to my mobile phone. It's a Galaxy Watch 7 that connects to my mobile phone.

ItsThe model is a Galaxy watch 7. The model is a Galaxy 7.

It's model isa Galaxy watch 7. It's a Galaxy watch 7.

I wouldn't use "model" here

Its model is the Galaxy watch 7. Its model is the Galaxy watch 7.

You're specifying a specific type of watch. You need a definite noun.

Its model is Galaxy watch 7.

First, I use it for monitoring my heart rate during doing cardio exercise on equipments, such as treadmills, stepmills, and indoor cycles. First, I use it for monitoring my heart rate during cardio exercise on equipment such as treadmills, stepmills, and indoor cycles.

'equipment' is both singular and plural. If you want to count it, you need to use the word 'piece'. ex. 3 pieces of equipment (not 3 equipments)

Firstly, I use it for monitoring my heart rate during doing cardio exercises, when I'm using equipments, such as treadmills, stepmills, andor indoor bicycles. Firstly, I use it for monitoring my heart rate during cardio exercises, when I'm using equipment such as treadmills, stepmills, or indoor bicycles.

I'd call indoor bikes "stationary bikes" "Or" because otherwise it kind of sounds like you're using them all at once I wouldn't ever pluralise "equipment". You can just say things like "we have a lot of exercise equipment you can use", "I bought some gym equipment", "I like to use the sports equipment", etc. Alternative: "I use it for monitoring my heart rate when I'm doing cardio exercises, using equipment such as..."

First, I use it for monitoring my heart rate during dowhile using cardio exercise equipments, such as treadmills, stepmills, and indoor cycles. First, I use it for monitoring my heart rate while using cardio exercise equipment, such as treadmills, stepmills, and indoor cycles.

Okay this through me off a bit you want to use using instead of doing because doing implies like in action to the thing itself. But here we're talking about the equipment you're using. As in you're not doing anything to the equipment itself. You're using it for exercise.

First, I use it for monitoring my heart rate during dowhile using cardio exercise equipments, such as treadmills, stepmills, and indoor cyclmachines, like treadmills, StairMasters, and stationary bikes. I use it for monitoring my heart rate while using cardio machines, like treadmills, StairMasters, and stationary bikes.

Your English was fine, but I naturalized it here. "StairMaster" is a brand name. You could also use "step machine".

DBy doing that, I don't overtrain or do exercise too lightlyundertrain. By doing that, I don't overtrain or undertrain.

It sounds way better to match the words here

DoingI do that, so I don't overtrain or do exercise too lightly. I do that, so I don't overtrain or do exercise too lightly.

More native sentence structure

Doing that, I don'tThat keeps me from overtraining or do exerciseing too lightly. That keeps me from overtraining or exercising too lightly.

Second, I wear it while I sleep to measure how long I sleep and whether I sleep enougj deeplydeeply enough or not. Second, I wear it while I sleep to measure how long I sleep and whether I sleep deeply enough or not.

Secondly, I wear it while I sleep to measure how long I sleep and whether I sleep enougj deeplydeeply enough or not. Secondly, I wear it while I sleep to measure how long I sleep and whether I sleep deeply enough or not.

Second, I wear it while I sleep to measure how long I sleep and whether I sleep enougj deeplydeeply enough or not. Second, I wear it while I sleep to measure how long I sleep and whether I sleep deeply enough or not.

I added the word" it" in order to specify what you're talking about here. You might also want to note that sleep deeply here doesn't necessarily mean we're talking about REM cycles. It could mean that you're harder to wake up from sleep. I would just look into that specific wording.

Second, I wear while II also wear my watch to monitor my sleep to. It measures how long I sleep, and whether I sleep enougjpt deeply or notenough. I also wear my watch to monitor my sleep. It measures how long I sleep, and whether I slept deeply enough.

If I don't sleep enough, I do exercise less or go to sleep earlier at night. If I don't sleep enough, I exercise less or go to sleep earlier at night.

If I don't sleep enough, I do exercise less or sleep earlier at nightI go to bed earlier. If I don't sleep enough, I do exercise less or I go to bed earlier.

You can omit "at night" as I feel like it's implied

If I don't sleep enough, I do less exercise less or sleep earlier at night. If I don't sleep enough, I do less exercise or sleep earlier at night.

If I don't sleep enoughmy sleep was bad, I do exercise less, or sleep earlier at nightgo to bed earlier. If my sleep was bad, I exercise less, or go to bed earlier.

To conclude, theis watch is one of the most important things in my daily life. To conclude, this watch is one of the most important things in my daily life.

To conclude, the isvwatch is one of the most important things in my daily life. To conclude, thisvwatch is one of the most important things in my daily life.

To conclude, the watch is one of the most important things in my daily life. The watch is one of the most important things in my daily life.