Jenna Olshefski was born on February 3, 2005 in Ohio to Mike and Dana Olshefski. She has a brother, Alec and a German Shepherd named Gideon. Currently, Jenna is an honor student at Grove City High School and will graduate from high school in 2023. She has been on honor roll every quarter and earned Pride Award. When Jenna has time outside of gymnastics, she enjoys baking, cooking, writing, swimming and being with her friends.

Jenna always had so much energy so when she was 5 years old, her parents signed Jenna up for a tumble class. No one thought that tumble class would open a door to a whole new world for Jenna, but it did. After a few months in classes, a coach saw potential and suggested Jenna join the pre-team program. Jenna started her competitive gymnastics career at Fliptastic Gymnastics in Hilliard, OH. Following her 2013 season, she moved to Universal Gymnasts, Inc. and has been there ever since. Jenna won the all-around title at the 2014 Level 5 State Championships.

In 2015, Jenna skipped level 6 and moved up to level 7. She placed sixth in the all-around with a 37.000 and third on floor exercise at the State Championships. Jenna was named to America's Top 100 on floor exercise with a 9.950. In 2016 as a level 8 gymnast, Jenna finished third in the all-around with a 37.575 and third on balance beam. She qualified to the Region 5 Championships, finishing fifth in the all-around with a 37.950 and fourth on balance beam and floor exercise. Jenna continued competing level 8 in 2017 where she grabbed gold medals on balance beam, floor exercise and in the all-around with a 37.950 at the State Championships. At the Region 5 Championships, she placed first in the all-around with a 38.375 and first on uneven bars and balance beam. Jenna was named to America's Top 100 on balance beam with a 9.750.

Jenna had a great level 9 season in 2018! She placed third in the all-around with a 37.550, first on balance beam and second on floor exercise at the State Championships. She won the all-around title with a 38.275 at the Region 5 Championships. She also earned gold medals on balance beam and floor exercise and a silver medal on uneven bars. Jenna qualified to the Level 9 Eastern Nationals in Rochester, NY, finishing first in the all-around with a 37.700, first on balance beam and second on uneven bars. Jenna was named to America's Top 100 on balance beam (2x), floor exercise and in the all-around.

As a first-year level 10 gymnast in 2019, Jenna finished first on balance beam and third on floor exercise at the State Championships. She earned a silver medal on floor exercise at the Region 5 Championships. In 2020, Jenna qualified to the Level 10 State Championships but was unable to compete due to COVID-19 pandemic. In 2021, Jenna placed first on floor exercise, second on vault and fourth overall at the State Championships. At the Region 5 Championships, she finished second in the all-around with a 38.600 and first on floor exercise. This qualified Jenna to the Junior Olympic Nationals in Daytona Beach, FL where she placed sixth in the all-around with a 38.100, second on floor exercise and third on vault out of 56 gymnasts.

Jenna trains 20 hours per week at Universal Gymnasts, Inc. in Hilliard, OH under coaches Dave Anthony, Natalia Lashchenova and Trevor O’Hara. She is working hard to qualify to the Junior Olympic Nationals. Her long-term goal is to obtain a Division I college gymnastics scholarship.