When it comes to staying on the treadmill, there are several synonyms you can interchangeably use. For one, you can say keep running on the treadmill or continue walking on the treadmill. You can also describe it as remaining on the treadmill, or sticking to your workout routine on the machine. Another possible synonym is persevering on the treadmill or pushing through your workout on the machine. Essentially, when you stay on the treadmill, you're committing to finishing your exercise routine and pushing yourself to reach your fitness goals. So, choose the synonym that best resonates with you and keep going!