The purpose of this study was to understand the relationship between back squat one-repetition maximum relative to body mass (1RMrel), countermovement jump height (CMJH), and optimal drop height in drop jump (DHopt). Fifteen male participants with various sport backgrounds and training experience completed a one repetition maximum (1RM) back squat, maximum countermovement jump (CMJ), and drop jumps (DJ) from incrementally increasing drop heights to determine which drop height elicited the greatest jump height. The DHopt testing protocol was unique in that smaller increments were used to determine DHopt compared to what has been reported in literature previously. Pearson correlation coefficients revealed that DHopt had small (r=0.214) and moderate (r=0.464) relationships with 1RMrel and CMJH, respectively. A second analysis (n=13) was conducted after two participants (i.e. powerlifters) were identified as possibly being representative of a different population. The second analysis found that DHopt had strong relationships with 1RMrel (r=0.645) and CMJH (r=0.690). Results from this study seem to suggest that individuals with greater 1RMrel and CMJH tend to have a higher DHopt. However, this relationship may not be observed among all populations due to likely differences in sport background, genetics, and/or training experience.

Background: Crossfit is a high-volume training form and is popular among society and military communities because of its metabolic and physical challenging conditioning program. Crossfit includes both aerobic and anaerobic training and performers of Crossfit use all three different metabolic pathways, the phosphagen system, glycolysis and oxidative system. Similarities in movement pattern clean, countermovement jump (CMJ) and sprint running exist and also the use of stretch shortening cycle (SSC), which is a biomechanical function that is used in for example plyometric exercises. Recent research has reported correlation between weightlifting, countermovement jump (CMJ) and sprint, however, few of these studies have used female Crossfit performers. Aim: The aim of this study was to examine if there is a correlation between the performances of a clean and linear sprint time in 20 meter and if there is a correlation between the performance of clean and height in CMJ. Method: To participate, the women had to be a member of a Crossfit gym since five months back, and have five month of experience of practicing the clean exercise. The study had two different test sessions were the first session was for one repetition max in clean and session two was for 20 meter sprint and CMJ. Result: Fifteen females participated in the study and the correlation between clean and CMJ showed a strong correlation (r =0,74, r2=0,55) and when controlling clean and CMJ for body mass, the result showed a very strong correlation (r=0.88). The associations between clean and sprint showed a moderate to strong negative correlation (r =-0,52, r 2=0,27) and when controlling for body mass the result was (r =-0.54). The association between CMJ and sprint showed a strong correlation (r=-0.69, r2=0,48) and when controlling for body mass the correlation was (r =-0.71). Conclusion:Findings from this current study showed that there is a strong relationship between CMJ and clean among female Crossfit participants. This indicate that weightlifting exercise, in this case clean, can improve power exercises as jump height, but not to forget the importance of practicing jump movements as well. For further research it would be interesting if the participants were divided in groups depending on how long they had practiced in Crossfit. To see if there would be any different in clean, sprint and jump among these measurements, and maybe use both squat jump and CMJ as a test for jump to see the different in the result it might give.

Despite the squat jump's intriguing dynamical properties and prevalence in athletics, there is a lack of information regarding the comprehensive functional role of muscles during the squat jump. To increase our understanding of the strategies the human body uses in accelerating joints and contributing energy to body segments, we incorporated experimental data from trained collegiate men and women into musculoskeletal computer simulations. We evaluated the simulations to determine fundamental coordination principles of the squat jump, and the effect of increased loading and gender on muscle strategies employed during the squat jump. Our results revealed that the plantar flexors and vasti were primarily involved in increasing the mechanical energy of the body, while the proximal muscles were primarily involved in redistributing energy throughout the body. The erector spinae muscles extended the lumbar spine, and contributed energy to the torso, while gluteus maximus and hamstrings extended the hip joint, and contributed energy to the pelvis. The vasti extended the knee joint, and contributed energy to the pelvis and torso. Our results suggested that the rectus femoris plays a critical role in converting rotational energy into vertical kinetic energy. Greater barbell loads reduced the rate of lumbar extension, and resulted in increased normalized energy contributions from soleus and vasti to the torso. When comparing the squat jumps between men and women, our results suggested that soleus and vasti are more active in men than women during the body-weight squat jump. / text

Abstract It has been shown that horse riding is a comprehensive exercise in which many of the body's muscle groups are activated. Horse riding can improve your coordination, strength, flexibility, balance, conditioning, posture and perception. The relationship between jump and sprint in explosive sports such as football, basketball and handball is well-studied. However, few studies have examined this relationship in sports where no explosively training is involved, such as horseback riding.  The aim of this study was to analyze the relationship between the sprint capacity of 5 and 20 meters and jump height in a countermovement jump and squat jump of riders.  In this study, 15 riders were analyzed and volunteered as test subjects, performed a predicted maximal 5 and 20-m sprints, vertical jump height by squat jumps (SJ), and countermovement jumps (CMJ). To analyze the relationship between SJ, CMJ, and 5 and 20 m sprinted, Spermans correlations of coefficient was used. Acorrelation between 0.3-0.49 was considered as moderate, all that is over this is a strong correlations and everything below is weak.  All jump was shown a strong negative linear correlation with sprint time of 5 to 20 m, SJ at 5 m rs = -0.69 , SJ at 20 m rs = -0.74 . The jump CMJ showed follow result at 5 m rs = -0.56 , CMJ at 20 m rs= -0.51 . The result of the strong negative linear correlation demonstrates that the higher the vertical jump height the rider has, the stronger is the relationship with sprint speed.  Vertical jump height and the correlation between vertical jump height and sprint at riders seem to be comparable to the correlation seen in athletes who exercise more explosive sports. / Sammanfattning Det har visat sig att ridning är en allsidig träning där många av kroppens muskelgrupper aktiveras. Ridning ger förbättrad koordination, styrka, rörlighet, balans, kondition, hållning samt perception. Sambandet mellan hopp och sprint i explosiva idrotter såsom fotboll, basket, handboll är välstuderat, men få studier har studerat detta samband i idrotter som inte tränar explosivt, såsom ridning. Syftet med studien var att undersöka sambandet mellan sprintförmågan på 5 och 20 meter samt hopphöjden i ett countermovement jump (CMJ) och squat jump (SJ) hos ryttare. I studien deltog och analyserades 15 kvinnliga ryttare i vertikal hopphöjd genom SJ och CMJ samt 5 och 20 meter sprint. För att studera sambandet mellan SJ, CMJ samt 5 och 20 m sprinttid användes Spermans korrelations kofficient (rs). En korrelation mellan 0.3-0.49 räknas som moderat, allt som är över räknas som starka korrelationer samt allt under 0,3 räknas som svaga. Vid samtliga hopp visades en stark negativ linjär korrelation med sprinttiden 5 och 20 m, följande resultat visades för SJ vid 5 m rs= -0,69 och SJ vid 20 m rs= -0,74. Vid hoppet CMJ visades följande resultat på 5 m rs= -0,56, CMJ vid 20 m rs=-0.51. Resultatet av den starka negativa linjära korrelationen påvisar att ju högre vertikal hopphöj ryttaren har desto starkare samband finns med sprinthastigheten. Vertikal hopphöjd och korrelationen mellan vertikal hopphöjd och sprint hos ryttare verkar vara jämförbar med den korrelation som ses hos idrottare som utövar mer explosiva sporter.

Thesis (M.S.)--Ohio University, August, 1995. / Title from PDF t.p.

Thesis (M.S.)--University of Wisconsin--Madison, 1960. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 66-67).

Thesis (Ph. D.)--University of Chicago, Dept. of Economics, June 2000. / Includes bibliographical references. Also available on the Internet.

Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2008. / Includes bibliographical references (p. 39-43).

No description available.

The investigation proposes a comparative study to determine whether or not there is a relationship between the running broad jump and the standing broad jump based upon the results of the performances of two hundred and seventy girls enrolled in Jefferson Junior High School, Abilene, Texas, and to determine whether or not one of the three allowed performances consistently results in the greatest distance.