1 00:00:00,900 --> 00:00:10,343 [ MUSIC ] 2 00:00:15,949 --> 00:00:17,417 >> HEY THERE, MY NAME IS 3 00:00:17,417 --> 00:00:19,419 JOE ACABA, AND I'M LIVING AND 4 00:00:19,419 --> 00:00:20,820 WORKING ON THE INTERNATIONAL 5 00:00:20,820 --> 00:00:22,288 SPACE STATION AS PART OF 6 00:00:22,288 --> 00:00:24,491 EXPEDITION 53. 7 00:00:24,491 --> 00:00:25,825 ONE OF THE BEST PARTS ABOUT 8 00:00:25,825 --> 00:00:27,260 LIVING ON THE SPACE STATION 9 00:00:27,260 --> 00:00:29,229 IS BEING ABLE TO FLOAT. 10 00:00:29,229 --> 00:00:30,130 JUST LIKE YOU WALK 11 00:00:30,130 --> 00:00:31,131 FROM PLACE TO PLACE 12 00:00:31,131 --> 00:00:32,465 THROUGHOUT YOUR DAY, 13 00:00:32,465 --> 00:00:34,067 WE FLOAT FROM PLACE TO PLACE 14 00:00:34,067 --> 00:00:35,702 THROUGHOUT OUR DAY. 15 00:00:35,702 --> 00:00:36,870 HOWEVER, WE HAVE LEARNED 16 00:00:36,870 --> 00:00:37,804 THAT THE SAME THING THAT 17 00:00:37,804 --> 00:00:39,172 ALLOWS US TO FLOAT-- 18 00:00:39,172 --> 00:00:40,840 MICROGRAVITY-- IS HARD 19 00:00:40,840 --> 00:00:42,942 ON OUR BODIES OVER TIME. 20 00:00:42,942 --> 00:00:44,010 OUR MUSCLES AND BONES 21 00:00:44,010 --> 00:00:44,844 ARE MADE OF MILLIONS 22 00:00:44,844 --> 00:00:46,579 OF TINY UNITS CALLED CELLS, 23 00:00:46,579 --> 00:00:47,614 AND THESE CELLS CAN HAVE 24 00:00:47,614 --> 00:00:49,716 PROBLEMS IN MICROGRAVITY. 25 00:00:49,716 --> 00:00:50,917 UP HERE ON THE STATION, 26 00:00:50,917 --> 00:00:52,185 BONES AND MUSCLES NO LONGER 27 00:00:52,185 --> 00:00:53,386 HAVE TO SUPPORT THE WEIGHT 28 00:00:53,386 --> 00:00:54,454 OF OUR BODIES, 29 00:00:54,454 --> 00:00:55,755 SO THEY GET WEAKER. 30 00:00:55,755 --> 00:00:56,723 ASTRONAUTS COULD DEVELOP 31 00:00:56,723 --> 00:00:57,957 SOMETHING CALLED MUSCLE 32 00:00:57,957 --> 00:00:59,592 ATROPHY, WHERE OUR MUSCLES 33 00:00:59,592 --> 00:01:01,594 BECOME WEAK FROM LACK OF USE. 34 00:01:01,594 --> 00:01:02,762 EACH BONE IN YOUR BODY 35 00:01:02,762 --> 00:01:04,330 IS MADE OF CELLS, TOO. 36 00:01:04,330 --> 00:01:06,199 A HEALTHY BONE HAS MORE DENSITY 37 00:01:06,199 --> 00:01:07,934 THAN AN UNHEALTHY BONE. 38 00:01:07,934 --> 00:01:09,369 WEAKENED BONES CAN LEAD TO 39 00:01:09,369 --> 00:01:11,905 A DISEASE CALLED OSTEOPOROSIS. 40 00:01:11,905 --> 00:01:13,506 FORTUNATELY, OUR SCIENTISTS 41 00:01:13,506 --> 00:01:14,941 AT NASA HAVE FIGURED OUT 42 00:01:14,941 --> 00:01:16,242 ONE WAY TO KEEP ASTRONAUTS 43 00:01:16,242 --> 00:01:17,577 HEALTHY AND STRONG-- 44 00:01:17,577 --> 00:01:20,079 IT'S CALLED EXERCISE. 45 00:01:20,079 --> 00:01:21,147 LET'S TAKE A LOOK AT 46 00:01:21,147 --> 00:01:22,882 HOW ASTRONAUTS EXERCISE 47 00:01:22,882 --> 00:01:24,384 IN SPACE. 48 00:01:24,384 --> 00:01:25,718 THIS MACHINE HERE IS 49 00:01:25,718 --> 00:01:27,587 THE ADVANCED RESISTIVE EXERCISE 50 00:01:27,587 --> 00:01:29,956 DEVICE, BUT WE CALL IT ARED. 51 00:01:29,956 --> 00:01:31,224 IT SIMULATES FREE WEIGHT 52 00:01:31,224 --> 00:01:33,193 EXERCISES IN NORMAL GRAVITY 53 00:01:33,193 --> 00:01:34,294 TO WORK ALL THE MAJOR 54 00:01:34,294 --> 00:01:35,228 MUSCLE GROUPS. 55 00:01:35,228 --> 00:01:36,429 ARED'S PRIMARY GOAL IS 56 00:01:36,429 --> 00:01:37,997 TO MAINTAIN OUR MUSCLE STRENGTH 57 00:01:37,997 --> 00:01:39,566 AND MASS SO THAT WE HAVE 58 00:01:39,566 --> 00:01:40,967 LESS OF A RECOVERY PERIOD 59 00:01:40,967 --> 00:01:42,869 WHEN WE LAND BACK ON EARTH. 60 00:01:42,869 --> 00:01:43,970 ALL RIGHT, SO THERE'S 61 00:01:43,970 --> 00:01:45,238 LOOKING AT LIFTING, BUT 62 00:01:45,238 --> 00:01:47,273 WHAT ABOUT A LITTLE CARDIO? 63 00:01:47,273 --> 00:01:49,008 WE HAVE A TREADMILL FOR THAT. 64 00:01:49,008 --> 00:01:50,243 LET'S CHECK IT OUT! 65 00:01:50,243 --> 00:01:54,481 [ MUSIC ] 66 00:01:54,481 --> 00:01:55,615 STAYING PHYSICALLY ACTIVE 67 00:01:55,615 --> 00:01:57,350 HELPS BOTH ASTRONAUTS IN SPACE 68 00:01:57,350 --> 00:01:58,685 AND HUMANS ON THE GROUND 69 00:01:58,685 --> 00:02:00,286 TO STAY HEALTHY, AND 70 00:02:00,286 --> 00:02:01,955 IT PREVENTS MUSCLE ATROPHY 71 00:02:01,955 --> 00:02:04,858 AND OSTEOPOROSIS. 72 00:02:04,858 --> 00:02:06,259 NOW YOU CAN TRY THE ACTIVITY 73 00:02:06,259 --> 00:02:07,594 CONNECTED TO THIS VIDEO 74 00:02:07,594 --> 00:02:08,895 TO LEARN MORE ABOUT 75 00:02:08,895 --> 00:02:10,630 MUSCLE AND BONE CELLS. 76 00:02:10,630 --> 00:02:12,098 I'M JOE ACABA, AND I HOPE 77 00:02:12,098 --> 00:02:13,166 YOU ENJOYED LEARNING ABOUT 78 00:02:13,166 --> 00:02:14,968 EXERCISE ON THE INTERNATIONAL 79 00:02:14,968 --> 00:02:16,102 SPACE STATION.