Video-conferencing services like Zoom Video Communications Inc. /zigman2/quotes/211319643/composite ZM +5.15% aren't the only tech tools seeing a rise in use since the outbreak of COVID-19. Some 41% of Americans used a fitness app for the first time during quarantine and over half (56%) are so confident in their home workouts that they plan to cancel their gym memberships, according to a survey of 2,000 people from Freeletics, a provider of AI-based fitness and lifestyle coaching. The survey was conducted by OnePoll. The average American used two fitness apps and took four online fitness classes during lockdown. The exercise-at-home movement is reflected in the stock performance of leading fitness vendors. Peloton Interactive Inc. /zigman2/quotes/208035743/composite PTON -0.43% shares have soared 119% this year, while those of Fitbit Inc. /zigman2/quotes/202323205/composite FIT +1.74% are up 5%. By comparison, the S&P 500 index /zigman2/quotes/210599714/realtime SPX +1.05% is down 0.4% in 2020.