{"product_id":"ballon-de-resistance-a-eau-hydrosphere","title":"38 cm Water Resistance Ball, Unstable Load | HydroSphere","description":"\u003ch1\u003e38 cm unstable load water resistance ball\u003c\/h1\u003e\n\u003cp\u003eUnlike traditional weights that exert force along a fixed axis, the \u003cstrong\u003eHydroSphere water resistance ball\u003c\/strong\u003e harnesses the fluid movement of water to create multidirectional instability. With every movement, the liquid shifts inside the 38 cm PVC sphere, forcing the abdominal core and stabilizing muscles to constantly adapt.\u003c\/p\u003e\n\u003ch3\u003eA dynamic hydraulic load for deep muscle conditioning\u003c\/h3\u003e\n\u003cp\u003eThe level of instability varies based on the fill level: when filled between one-third and two-thirds of its capacity, the continuous movement of the water intensely challenges the torso, obliques, shoulders, and overall posture.\u003c\/p\u003e\n\u003ch3\u003eWhy add the HydroSphere ball to your training?\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e360° Instability:\u003c\/strong\u003e The unpredictable movement of water engages the deep core muscles throughout the entire exercise.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFully adjustable intensity:\u003c\/strong\u003e Adjust the weight (1 liter of water = 1 kg) according to your resistance and mobility goals.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eQuiet and safe design:\u003c\/strong\u003e Its flexible structure protects your floors and prevents impact noise, ideal for apartment use.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eUltra-compact storage:\u003c\/strong\u003e Once drained of water, the ball folds up and takes up almost no space.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eUser Guide: 5 Dynamic Core Exercises\u003c\/h3\u003e\n\u003col\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFront Carry:\u003c\/strong\u003e 3 × 40 seconds. Hold the sphere against your sternum, shoulders down, while maintaining steady breathing.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTorso Rotation:\u003c\/strong\u003e 3 × 16 repetitions. From a seated position, rotate your torso from left to right while keeping your pelvis fixed.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGoblet Squat:\u003c\/strong\u003e 3 × 12 repetitions. Hold the ball against your chest to increase core engagement during squats.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAsymmetric Walk:\u003c\/strong\u003e 3 × 30 meters. Carry the weight on one side only to strengthen anti-lateral flexion.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDynamic Plank:\u003c\/strong\u003e 3 × 30 seconds. In a plank position, place one hand on the sphere to stabilize your entire body.\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cdiv style=\"border: 1px solid #C9A24B; border-radius: 8px; padding: 22px; margin: 30px 0; background: #0B0B0D;\"\u003e\n\n\u003cp style=\"margin: 0 0 8px; font-weight: bold; color: #c9a24b;\"\u003eLooking for a complete progression?\u003c\/p\u003e\n\n\u003cp style=\"margin: 0 0 16px; color: #ffffff;\"\u003eCombine AquaNess for the foundation, HydroShape for mobility, and HydroSphere for instability. With the full pack, you get all three at once and receive \u003cstrong style=\"color: #e8ce8a;\"\u003eThe Sportivearena Method for free\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp style=\"margin: 0;\"\u003e\u003ca href=\"\/en\/products\/pack-gamme-aquatique\" style=\"display: inline-block; background: #C9A24B; color: #0b0b0d; padding: 13px 24px; border-radius: 6px; text-decoration: none; font-weight: bold;\"\u003eDiscover the Aquatic Range Pack\u003c\/a\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\u003ch3\u003eTips and precautions before training\u003c\/h3\u003e\n\u003cp\u003ePerform 5 to 10 minutes of joint and muscle warm-ups before your session. Ensure that the sealing cap is tightly closed before starting your sets.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eWhat is the weight of the HydroSphere ball?\u003c\/h3\u003e\n\u003cp\u003eThe weight depends on the amount of water added. One liter of water equals one kilogram. A load of 5 to 10 kg already provides a significant level of instability due to the fluid displacement.\u003c\/p\u003e\n\u003ch3\u003eHow do I maintain the water ball?\u003c\/h3\u003e\n\u003cp\u003eUse cold tap water. If you do not plan to use it for several days, we recommend emptying it and letting it dry away from direct sunlight.\u003c\/p\u003e\n\u003ch3\u003eIs the ball suitable for apartment training?\u003c\/h3\u003e\n\u003cp\u003eYes. The flexible PVC shell prevents damage to the floor and allows for completely silent training.\u003c\/p\u003e\n\u003ch3\u003eHow long does it take to fill the sphere?\u003c\/h3\u003e\n\u003cp\u003eFilling takes between 1 and 2 minutes under a standard faucet, and emptying takes only a few seconds.\u003c\/p\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003e1 × HydroSphere water resistance ball (38 cm), carrying straps, and sealing cap.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: This product is a general fitness device. In case of specific health conditions or returning to sports, seek advice from a healthcare professional.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSportivearena:\u003c\/strong\u003e Quality training and mobility equipment for your home gym space.\u003c\/p\u003e","brand":"Sportivearena","offers":[{"title":"Sphere 38 cm","offer_id":52796265431383,"sku":"CJYD239229701AZ","price":69.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/8694\/3063\/files\/hydrosphere-homme.png?v=1786399532","url":"https:\/\/sportivearena.com\/en\/products\/ballon-de-resistance-a-eau-hydrosphere","provider":"Sportivearena","version":"1.0","type":"link"}