Karl Knopf Books

Stretching for 50
Weights for 50
Weights for 50

By Karl Knopf

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Total Sports Conditioning for Athletes 50
Core strength for 50
Core strength for 50

By Karl G. Knopf

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A guide to core strength for adults over the age of fifty, with such types of workouts as partners, supine floor, and balls.

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Resistance band workbook
Resistance band workbook

By Karl G. Knopf

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Trigger point therapy with the foam roller
Trigger point therapy with the foam roller

By Karl G. Knopf

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"Deceptively simple and incredibly versatile, the trigger point foam roller is a highly effective self-therapy tool. By following the step-by-step movements in this book, you can maximize its heali...

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Injury rehab with resistance bands
Heal your frozen shoulder
Heal your frozen shoulder

By Karl G. Knopf

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Stretching for 50
Stretching for 50

By Karl G. Knopf

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Just ten minutes a day of these modified stretches is guaranteed to help you improve your mobility without pain or injury. Stretching for 50+ is filled with safe, easy routines for any age. Learn w...

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Estiramientos 50
Estiramientos 50

By Karl G. Knopf

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"Mejora tu flexibilidad, mejora tu salud. En Estiramientos +50 encontrarás más de 90 rutinas fáciles y seguras para mantener un cuerpo sano y flexible, sin importar la edad. Con solo diez minutos a...

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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