A novel portable grip and finger strength training hangboard device allows a user to perform weightlifting exercises, with a focus on grip strength training. The device is unique as it eliminates a user of intermediary items such as ropes, or bolts for latching onto a source of resistance. The source of resistance is gym equipment comprising dumbbells, barbells, and pullup bars. The device has two main components: a gripping mechanism and a built-in hook anchor. The user interacts with the gripping mechanism and adjusts their hands to the desired grip, such as a pinch grip or a crimp grip. The gripping mechanism of the device has varying embodiments and features comprising grooves, loops and ridges. The built-in hook anchor of the device quickly latches on to the source of resistance and allows the user to easily change resistance from one workout to next.

Embodiments relate to a method for manufacturing a screen fabric to be installed in a golf simulator, the method including: a step of manufacturing a fabric body having a predetermined area by processing a biodegradable resin (poly(lactic acid) (PLA)) into yarn and weaving the yarn; and a coating step of applying a coating solution to at least one of both surfaces of the fabric body to form a coating layer, wherein at least one gap exposing the fabric body is formed in the coating layer.

Biodegradable sports balls, are described. A biodegradable sports ball includes a petroleum based material, a biological based filler material blended with the petroleum based material, and a biodegradable additive blended with the petroleum based material and the biological based filler material. The biodegradable sports ball is biodegradable based on blending of the biodegradable additive with the petroleum based material. The biodegradable sports ball may be a tennis ball, a racquet ball, a ping pong ball, a pickleball, a wiffle ball, a foam ball, a soccer ball, a football, a rugby ball, a baseball, a softball, a volley ball, a basketball, a playground ball, or a golf ball. The biological based filler material may include calcium carbonate and may provide increased strength and/or durability to the biodegradable sports ball.

An environmentally friendly functional golf tee comprising a prefilled, filled and/or refillable hollow tee stem having a top and a bottom. The functional golf tee also includes a removable cap mechanically connected to the top of the tee stem. The bottom of the tee stem comprises a pointed and/or pointed and threaded tip. The bottom of the tee stem may be permanent or removable. The cap is configured to retain a beverage ranging from OZ to 3 liquid ounces within the hollow tee stem. The top of the hollow tee stem and the cap are each configured to accept a golf ball for teeing. The functional golf tee comprises a composite material selected from at least one of a bio-degradable plastic, carbohydrate-based polymeric plastic, a compostable plastic, a bioplastic, a wheat straw, or a sustainably sourced paper product.