Related Clues:

• Continuous expanse
• Implausible argument, say
• Twinkies have a long one
• Expand chest, prepared to limit time on run
• Lengthen sentence
• Quiet, Tolkien character might survive this long, perhaps
• Time in jail
• Do some Pilates
• Extremely silent, given gag for a punishment
• Extend time in prison
• Extend prison term
• Warm up before working out
• Continuous period of time
• Extend period of time in prison
• Way to heave and extend