2,839 research outputs found
A load-velocity relationship for men and women in overhead throwing performance
In many movements, resistance (load) and velocity are
inversely related to each other (Schilling et al., 2008).
This relationship is often ascribed to skeletal muscle
properties. Hill (1938) described a hyperbolic relationship
(Hill’s curve) between force and velocity for isolated
muscles. Many other researchers in muscle physiology as
well as researchers in the more applied sciences used this
association to describe and explain phenomena of muscle
contraction. [...]info:eu-repo/semantics/publishedVersio
Does combined dry land strength and aerobic training inhibit performance of young competitive swimmers?
The aim of the current study was twofold: (i) to examine the
effects of eight weeks of combined dry land strength and aerobic
swimming training for increasing upper and lower body
strength, power and swimming performance in young competitive
swimmers and, (ii) to assess the effects of a detraining
period (strength training cessation) on strength and swimming
performance. The participants were divided into two groups: an
experimental group (eight boys and four girls) and a control
group (six boys and five girls). Apart from normal practice
sessions (six training units per week of 1 h and 30 min per day),
the experimental group underwent eight weeks (two sessions per
week) of strength training. The principal strength exercises were
the bench press, the leg extension, and two power exercises such
as countermovement jump and medicine ball throwing. Immediately
following this strength training program, all the swimmers
undertook a 6 week detraining period, maintaining the normal
swimming program, without any strength training. Swimming
(25 m and 50 m performances, and hydrodynamic drag values),
and strength (bench press and leg extension) and power (throwing
medicine ball and countermovement jump) performances
were tested in three moments: (i) before the experimental period,
(ii) after eight weeks of combined strength and swimming
training, and (iii) after the six weeks of detraining period. Both
experimental and control groups were evaluated. A combined
strength and aerobic swimming training allow dry land strength
developments in young swimmers. The main data can not
clearly state that strength training allowed an enhancement in
swimming performance, although a tendency to improve sprint
performance due to strength training was noticed. The detraining
period showed that, although strength parameters remained
stable, swimming performance still improved.info:eu-repo/semantics/publishedVersio
Effects of two different training programs with same workload on throwing velocity by experienced water polo players
To investigate the effects of two different strength-training programs with the same workload (impulse) on throwing velocity in water polo, 30 water polo players (M age = 17.1 yr., SD = 4.9; M mass = 71.2 kg, SD = 14.7; M height = 1.75 m, SD = 0.09 m) were randomly divided in two groups based upon throwing performance with water polo ball. The medicine-ball training group performed 3 x 6 reps with a 3-kg medicine ball, while the combination training group completed 1 x 9 repetitions with the 3-kg medicine ball, followed by 3 x 14 repetitions with a water polo ball. Both groups trained eight weeks twice per week in addition to their regular water polo training. Throwing velocity was measured with a Doppler radar gun before and after the training period. Testing included throws with a water polo ball on land and in water, as well as with 1-kg and 3-kg medicine balls on land. Statistically significant increases were found in mean peak throwing velocity with the water polo, 1-kg, and 3-kg medicine balls after training. No differences between the groups were found, except in throwing velocity with water polo on land, with a statistically significantly larger increase for the combination training group (+7.6%) than the medicine-ball training group (+3.4%). These findings indicate that after training with the same workload (impulse), increases in throwing velocity in water polo are similar and suggesting workload may be a critical variable for training results.info:eu-repo/semantics/publishedVersio
Resource Planning for Neglected Tropical Disease (NTD) Control Programs: Feasibility Study of the Tool for Integrated Planning and Costing (TIPAC).
<p>Resource Planning for Neglected Tropical Disease (NTD) Control Programs: Feasibility Study of the Tool for Integrated Planning and Costing (TIPAC)</p
Splenic artery embolization in a woman with bleeding gastric varices and splenic vein thrombosis: a case report
<p>Abstract</p> <p>Introduction</p> <p>Gastric variceal bleeding due to splenic vein thrombosis is a life-threatening situation and is often difficult to manage by endoscopy. In the worst cases, an emergency splenectomy may be required to stop variceal bleeding.</p> <p>Case presentation</p> <p>We report the case of a 60-year-old Caucasian woman with bleeding gastric varices secondary to splenic vein thrombosis treated by splenic artery embolization. Successful embolization was performed by depositing coils into the splenic artery resulting in cessation of variceal bleeding. After embolization there was no recurrence of bleeding.</p> <p>Conclusion</p> <p>Splenic artery embolization can be an effective and definite treatment for variceal bleeding secondary to splenic vein thrombosis.</p
Ipsilateral reexpansion pulmonary edema after drainage of a spontaneous pneumothorax: a case report
We report a case of ipsilateral reexpansion pulmonary edema occurring after the insertion of a chest tube in a patient with spontaneous pneumothorax. The patient received supplemental oxygen via a non-rebreather face mask to compensate for hypoxemia. 24 hours after the acute event, the patient recovered completely without residual hypoxemia. Reexpansion pulmonary edema after the insertion of a thoracic drainage for pneumothorax or pleural effusion is a rare complication with a high mortality rate up to 20%. It should be considered in case of hypoxemia following the insertion of a chest tube. The exact pathophysiology leading to this complication is not known. Risk factors for reexpansion pulmonary edema should be evaluated and considered prior to the insertion of chest tubes. Treatment is supportive
Slx8 removes Pli1-dependent protein-SUMO conjugates including SUMOylated Topoisomerase I to promote genome stability
Peer reviewedPublisher PD
Correlating the site of tympanic membrane perforation with Hearing loss
This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens
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