Like to stay fit and have fun? Check our picks for healthy activities in the next week:Head to Zilker Park on Friday, Sept. 8, for the Zilker Relays, the unofficial kickoff of the fall racing season in Austin. Teams of four will run a looped, 2.5-mile course, battling it out in a slew of divisions, including men, women, mixed, seniors, corporate, family, running store, civil service and fitness. Stick around for the finish party, which will include food from TacoDeli, beer and live music. The kids race starts at 6 p.m.; adults start at 6:30 p.m. Entry fee is $50 per person. To register, go here.Weather looks good for the next Moonlight Bat Float, set for Saturday, Sept. 9 on Lady Bird Lake. Sign-in begins at 6:30 p.m.; paddlers will push off at 7 p.m. from the docks of Texas Rowing Center, 1541 West Cesar Chavez Street. The Flyin’ A’s will provide live music as canoes, kayaks and standup paddleboards make their way to the Congress Avenue Bridge to watch the bats emerge for a night of mosquito hunting. For more information go here.On Sunday, Sept. 10, help organizers reach their goal of raising $100,000 for brain cancer research and local patient support at the Brain Power 5K, presented by Baylor Scott & White Health. The race takes place at the H-E-B Center at Cedar Park. The Kids K starts at 8 a.m. The Survivor Stride starts at 8:15 a.m., followed by the 10K at 8:30 a.m. and the 5K and 1-miler at 8:40 a.m. The post race party starts at 9:30 a.m. Entry fee ranges from $12 for an untimed kids 5K/Kids Fun Run to $40 for the adult timed 10K. Funds will benefit the Dr. Marnie Rose Foundation for Brain Cancer Research at The University of Texas MD Anderson Cancer Center. To register go here.Ready to chill? The Hyatt Regency Austin will host its September “Pints & Poses” class at 6:30 p.m. Monday, Sept. 11 in the Texas Ballroom on the second floor. Ferny Barcelo will lead a free yoga class, accompanied by live, meditated music spun by local yoga DJ Trey Tarwater. Attendees are encouraged to bring and donate an item for Front Steps to help the homeless affected by Hurricane Harvey. The shelter needs soap, shampoo, new underwear and socks. Guests are encouraged to bring their own mats. After class, participants get a coupon for a free draft beer at the hotel’s Marker 10 bar. Attendees also get free parking in the hotel garage. For more information go here.