Let's be real here, the sprinting in Warmerise did have some flaws. It drained way too fast. However, now it's removed and everyone is in panic. I have some suggestions for this.
1) Keep sprint out, increase movement speed to former sprint's speed
2) Add back sprint, but with decreased energy drain
3) Stop it. Get some help. Start big polls that are everywhere, not just the polls section, before implementing a major game changing update.