Daily backpacker budget: $20 ~ $35. Bolivia is the ultimate cheapie of South America. Things may be very basic here as itâs a dirt poor country but your dollars sure go a long way. It is the cheapest country for accommodation and the cheapest for food and drink as well.
The plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include: 1  Primary muscles: erector spinae, rectus abdominis (abs), and transverse abdominus.he plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include: 1  Primary muscles: erector spinae, rectus abdominis (abs), and transverse abdominus.
If youâre interested in using your own body weight to get fit and functional, but donât know exactly what muscles does the plank work, this article gives you a refreshing look at one of the best forms of exercise out there!rom the Adductor Hallusic of the big toes to the traps, planks almost have no limits. In essence planking is the act of suspending the body above ground somehow and using the muscles (along with leverage) to fight against gravity. SEE ALSO: The Plank Exercise â What You Need to Know.