Walking & Jogging Heart Rate Zone Finder

Enter your age to calculate your target heart rate zones for exercise.

Enter Your Age:

${zone.name} (${zone.intensity})

${zone.description}

${zone.range} `; }); pdfHTML += `

Disclaimer: This report provides an estimate based on a standard formula. It is not a substitute for professional medical advice. Consult a healthcare provider before beginning any new exercise program.

`; pdfContentContainer.innerHTML = pdfHTML; pdfContentContainer.classList.remove('hidden'); pdfContentContainer.style.position = 'absolute'; pdfContentContainer.style.left = '-9999px'; try { const { jsPDF } = window.jspdf; const canvas = await html2canvas(pdfContentContainer, { scale: 2, useCORS: true }); const imgData = canvas.toDataURL('image/png'); const pdf = new jsPDF({ orientation: 'portrait', unit: 'mm', format: 'a4' }); const pdfWidth = pdf.internal.pageSize.getWidth(); const pdfHeight = (canvas.height * pdfWidth) / canvas.width; pdf.addImage(imgData, 'PNG', 0, 0, pdfWidth, pdfHeight); pdf.save('Heart-Rate-Zone-Report.pdf'); } catch (error) { console.error("Failed to generate PDF:", error); } finally { pdfContentContainer.classList.add('hidden'); pdfContentContainer.style.position = ''; pdfContentContainer.style.left = ''; } }; // --- EVENT LISTENERS --- calculateBtn.addEventListener('click', calculateZones); });